Difference between revisions of "Constriction"

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'''Constriction''' is the act of grabbing a target, preventing it from moving away, and crushing it to death over several turns. This lowers the [[ev]]asion of the target, and prevents them from moving or [[blink]]ing away.
+
'''Constriction''' is the act of grabbing a target, preventing it from moving away, and crushing it to death over several turns. This lowers the [[ev]]asion of the target, and prevents them from moving away.
  
 
==List of constrictors==
 
==List of constrictors==
Line 15: Line 15:
 
*{{monsterlink|Tentacled monstrosity}}
 
*{{monsterlink|Tentacled monstrosity}}
 
*{{monsterlink|Starspawn tentacle}}
 
*{{monsterlink|Starspawn tentacle}}
 +
*{{monsterlink|Formless jellyfish}}
 
*{{LightCyan|x}} [[File:Octopode (monster).png]] '''[[Octopode (monster)|Octopode]]'''
 
*{{LightCyan|x}} [[File:Octopode (monster).png]] '''[[Octopode (monster)|Octopode]]'''
 
*{{monsterlink|Vashnia}}
 
*{{monsterlink|Vashnia}}
 +
*{{monsterlink|Erica}}
 
*'''[[Grasping Roots]]'''
 
*'''[[Grasping Roots]]'''
 
**{{monsterlink|Jorgrun}}
 
**{{monsterlink|Jorgrun}}
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===Melee Constriction===
 
===Melee Constriction===
−
Constriction can occur whenever a constriction-capable character or monster makes a melee attack (not necessarily [[Unarmed Combat]]). All the following conditions apply:<ref>{{source ref|0.30.0|actor.cc|687}}</ref>
+
Constriction can occur whenever a constriction-capable character or monster makes a melee attack (not necessarily [[Unarmed Combat]]). All the following conditions apply:<ref>{{source ref|0.32.1|actor.cc|740}}</ref>
 
*The attacker is not constricting another creature, unless the attacker is an Octopode. Octopodes are capable of maintaining up to eight at once (it doesn't matter if you wield weapons or shields).
 
*The attacker is not constricting another creature, unless the attacker is an Octopode. Octopodes are capable of maintaining up to eight at once (it doesn't matter if you wield weapons or shields).
 
*The defender is not constricted or engulfed by another creature.
 
*The defender is not constricted or engulfed by another creature.
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*The defender must be next to the attacker (weapons of reaching don't allow you to constrict non-adjacent targets).
 
*The defender must be next to the attacker (weapons of reaching don't allow you to constrict non-adjacent targets).
  
−
If all the previous requisites are met, the game rolls the to_hit of the attacker and the evasion/SH of the defender. For the player this is the standard [[auxiliary attack]] to_hit. Its calculated as follows:
+
If all the previous requisites are met, the game rolls the to_hit of the attacker and the evasion/SH of the defender. For the player this is the standard [[auxiliary attack]] to_hit. It's calculated as follows:
−
  to_hit = 13 + DEX*0.75 + Fighting*0.3 + Slaying bonus + Other bonuses<ref>{{source ref|0.30.0|fight.cc|71}}</ref>
+
  to_hit = 13 + 0.75 * DEX + 0.3 * Fighting + Slaying bonus + Other bonuses<ref>{{source ref|0.32.1|fight.cc|73}}</ref>
  
−
For the monsters, it is basically:
+
For the monsters, it's:
−
  to_hit = 18 + HD*1.5 + Other bonuses (replace 1.5 with 2.5 if the monster is a [[:Category:Fighter|fighter]] i.e. naga warriors)
+
  to_hit = 18 + 1.5 * HD + Other bonuses (replace 1.5 with 2.5 if the monster is a [[:Category:Fighter|fighter]] i.e. naga warriors)
−
If the attack hits, the constriction starts.
+
If the attack hits, the constriction starts, though monsters only have a 2/3 chance to apply constriction in melee.
  
 
===Spell Constriction===
 
===Spell Constriction===
Line 61: Line 63:
  
 
===Constriction Immunity===
 
===Constriction Immunity===
−
The following monsters are immune:<ref>{{source ref|0.30.0|monster.cc|3834}}</ref>
+
The following monsters are immune:<ref>{{source ref|0.32.1|monster.cc|3920}}</ref>
 
*[[list of jellies|jellies]],
 
*[[list of jellies|jellies]],
 
*[[:Category:Spiny|spiny]] monsters,
 
*[[:Category:Spiny|spiny]] monsters,
 
*[[:Category:insubstantial monsters|insubstantial]] monsters.
 
*[[:Category:insubstantial monsters|insubstantial]] monsters.
  
−
Player sources:<ref>{{source ref|0.30.0|player.cc|6438}}</ref>
+
Player sources:<ref>{{source ref|0.32.1|player.cc|6974}}</ref>
−
*[[insubstantial]] forms, like the [[Storm Form]] or [[wisp form]],
+
*[[insubstantial]] forms, like [[Storm Form]] or [[wisp form]],
 
*the [[Spiny (mutation)|Spiny]] mutation, which is available only to [[demonspawn]],
 
*the [[Spiny (mutation)|Spiny]] mutation, which is available only to [[demonspawn]],
−
*[[slick slippers]] unrand.
+
*[[Slick slippers]] unrand.
  
 
==Maintaining Constriction==
 
==Maintaining Constriction==
−
While the target is constricted, it will take an increasing amount of damage each turn, will be unable to move in any direction, and will suffer an [[ev]]asion penalty (-3 EV for the player; for monsters EV is divided by <code>2 + body [[size]]</code>). Attempting to move away will constitute an escape attempt, using all of the above variables along with the number of escape attempts thus far (successive attempts have better success rates) to determine whether or not the escape succeeds.
+
While the target is constricted, it will take damage each turn, will be unable to move in any direction, and will suffer a -10 [[ev]]asion penalty. Attempting to move away will constitute an escape attempt, which for players has a 40% chance to succeed the first time. Subsequent escape attempts increase the chance to 75%, then 100%.
 +
 
 +
<!-- TODO: monster escape chance formula -->
  
 
===Damage Calculations===
 
===Damage Calculations===
 
The amount of damage inflicted every 10 [[aut]]s is:
 
The amount of damage inflicted every 10 [[aut]]s is:
−
   (Base damage) * (1 + log2(1 + Duration/5)) * (0.33 + 0.67 * (XL/27))
+
   (Base damage) * (0.33 + 0.67 * (XL / 27))
  
−
*'''Base damage''': For players constricting in melee, this is equal to <code>2d([[Strength]]/5)</code>. A character with 20 strength does twice the damage as a character with 10. When using [[Borgnjor's Vile Clutch]] or a [[wand of roots]], it depends of the [[spellpower|power]] of the cast. For monsters, it is the base damage of that particular attack.
+
*'''Base damage''': For players constricting in melee, this is equal to <code>2d[(110 + (25 * XL)) / 81]</code>. When using [[Borgnjor's Vile Clutch]] or a [[wand of roots]], it depends of the [[spellpower|power]] of the cast. For monsters, it is the base damage of that particular attack.
−
*'''Duration modifier''': The second factor means that the more time you have been constricting a monster the more damage you do. The damage is increased by approximately 20% each turn, so after 5 turns you will do twice as much damage as you did in the first turn. After the fifth turn the rate is a bit lower than 20%.
 
 
*'''Experience level modifier''': The third factor means that your damage increases linearly with your [[experience level]]. A level 27 character will do thrice as much damage as one at level 1.
 
*'''Experience level modifier''': The third factor means that your damage increases linearly with your [[experience level]]. A level 27 character will do thrice as much damage as one at level 1.
  
 
This damage is then modified as follows:
 
This damage is then modified as follows:
  
−
*'''AC reduction''': Unlike most melee attacks, constriction is not reduced by a random number between 0 and [[AC]]; the damage reduction is a random number between 0 and <code>1 + AC/2</code>. This means that constriction bypasses half of the AC.
+
*'''AC reduction''': Unlike most melee attacks, constriction is not reduced by a random number between 0 and [[AC]]; the damage reduction is a random number between 0 and <code>1 + AC / 2</code>. This means that constriction bypasses half of the AC.
 
*'''Time scale''': The previous formula calculates how much damage you do every 10 [[aut]]s. That amount needs to be scaled depending on how many auts you have spent in this turn. For example: if you are attacking with a [[dagger]] at minimum delay (5 aut), the previous amount will be multiplied by <code>5/10</code> (after AC reduction).
 
*'''Time scale''': The previous formula calculates how much damage you do every 10 [[aut]]s. That amount needs to be scaled depending on how many auts you have spent in this turn. For example: if you are attacking with a [[dagger]] at minimum delay (5 aut), the previous amount will be multiplied by <code>5/10</code> (after AC reduction).
  
 
==Escaping Constriction==
 
==Escaping Constriction==
 
Along with simply succeeding at an escape attempt, there are a number of other methods for breaking free:
 
Along with simply succeeding at an escape attempt, there are a number of other methods for breaking free:
−
*Killing the constrictor
+
*Killing the constrictor.
−
*If the constrictor moves from its current tile, constriction ends (even if the destination is still adjacent to the constricted target)
+
*If the constrictor moves from its current tile, constriction ends (even if the destination is still adjacent to the constricted target).
−
**The [[dispersal (brand)|dispersal]] and [[distortion]] brands can force the constrictor to blink away (or be banished to [[the Abyss]])
+
**The [[dispersal (brand)|dispersal]] and [[distortion]] brands can force the constrictor to blink away (or be banished to [[the Abyss]]).
−
**Casting [[Teleport Other]], [[Dispersal]] or [[Disjunction]] has a similar effect
+
**Casting [[Teleport Other]], [[Dispersal]] or [[Disjunction]] has a similar effect.
−
**Forcing the constrictor back with [[Iskenderun's Mystic Blast]] may also work but may not be as effective against larger monsters
+
**Forcing the constrictor back with [[Iskenderun's Mystic Blast]] may also work but may not be as effective against larger monsters.
−
**Casting [[Polar Vortex]] will force the enemy away from you much more aggressively
+
**Casting [[Polar Vortex]] will force the enemy away from you much more aggressively.
−
*Disabling the constrictor with [[confusion]], [[Paralyze|paralysis]], [[Petrify|petrification]], [[fear]], or [[Sleep|unconsciousness]] immediately breaks constriction
+
**[[Gell's gravitambourine]] can move a constrictor.
−
**[[wand of charming|Charming]] or [[polymorph]]ing the constrictor also breaks constriction (and likely prevents them from making future attempts)
+
*Disabling the constrictor with [[confusion]], [[Paralyze|paralysis]], [[Petrify|petrification]], [[fear]], or [[Sleep|unconsciousness]] immediately breaks constriction.
−
**[[Elyvilon]]'s healing abilities may allow you to pacify the constrictor
+
**[[wand of charming|Charming]] or [[polymorph]]ing the constrictor also breaks constriction (and likely prevents them from making future attempts).
 +
**[[Elyvilon]]'s healing abilities may allow you to pacify the constrictor.
 
*Becoming immune to constriction will immediately end the status.
 
*Becoming immune to constriction will immediately end the status.
−
** [[Storm Form]] is immune to constriction.
+
**[[Storm Form]] is immune to constriction.
−
** Casting [[Dragon Form]] will greatly increase your size; only tentacled monstrosities are large enough to constrict those forms.
+
**[[Dragon Form]] is giant size, so it can only be constricted by tentacled monstrosities.
−
*Any source of [[blink]]ing can get you free. It counts as two escape attempts.
+
*Any source of [[blink]]ing can get you free.
−
**[[Barachim]] can hop away, while [[Dithmenos]] gives Shadow Step. Both also count as two escape attempts, like with blink.
+
*[[Barachi]]m can hop away, which will always escape constriction.
−
*[[Teleportation]] will always let you escape constriction
+
*[[Teleportation]] will always let you escape constriction.
−
*[[Formicid]]'s shaft ability will always escape constriction
+
*[[Formicid]]'s shaft ability will always escape constriction.
−
*[[Zin]]'s Sanctuary ability breaks constriction
+
*[[Zin]]'s Sanctuary ability breaks constriction.
−
*[[Ru]]'s Draw Out Power and Power Leap will always escape construction
+
*[[Ru]]'s Draw Out Power and Power Leap will always escape construction.
  
 
==History==
 
==History==
 +
*In [[0.32]], constriction was reworked. Prior to this version:
 +
**Damage increased over time when applied to monsters.
 +
**Escape chance for players used a more complex formula, and blinking and related effects did not guarantee escape.
 +
**Escape chance for monsters did not care about HD.
 +
**Constriction applied a -3 EV penalty to players and divided monster EV depending on size.
 +
**Monster melee constriction always applied but dealt less damage.
 +
**Grasping Roots duration was more variable, and its damage was higher.
 +
**Player melee constriction cared about Str.
 +
**All player sources dealt less damage.
 
*Since [[0.18]], to-hit only depends on [[Dexterity]].
 
*Since [[0.18]], to-hit only depends on [[Dexterity]].
 +
*Prior to [[0.12]], the duration modifier to damage was applied to players.
  
 
==References==
 
==References==
 
<references/>
 
<references/>
 
[[Category:Status effects]]
 
[[Category:Status effects]]

Latest revision as of 02:20, 17 January 2025

Version 0.32: This article is up to date for the latest stable release of Dungeon Crawl Stone Soup.

Constriction is the act of grabbing a target, preventing it from moving away, and crushing it to death over several turns. This lowers the evasion of the target, and prevents them from moving away.

List of constrictors

Monsters

Playable species

Forms

Other Constriction Effects

Initiating Constriction

Melee Constriction

Constriction can occur whenever a constriction-capable character or monster makes a melee attack (not necessarily Unarmed Combat). All the following conditions apply:[1]

  • The attacker is not constricting another creature, unless the attacker is an Octopode. Octopodes are capable of maintaining up to eight at once (it doesn't matter if you wield weapons or shields).
  • The defender is not constricted or engulfed by another creature.
  • The attacker must be able to see the victim.
  • The attacker is not confused.
  • The size of the attacker is greater than or equal to the size of the defender.
  • The defender is not immune to constriction attacks (see below).
  • The defender must be next to the attacker (weapons of reaching don't allow you to constrict non-adjacent targets).

If all the previous requisites are met, the game rolls the to_hit of the attacker and the evasion/SH of the defender. For the player this is the standard auxiliary attack to_hit. It's calculated as follows: 

to_hit = 13 + 0.75 * DEX + 0.3 * Fighting + Slaying bonus + Other bonuses[2]

For the monsters, it's: 

to_hit = 18 + 1.5 * HD + Other bonuses (replace 1.5 with 2.5 if the monster is a fighter i.e. naga warriors)

If the attack hits, the constriction starts, though monsters only have a 2/3 chance to apply constriction in melee.

Spell Constriction

For Borgnjor's Vile Clutch, wand of roots, or Grasping Roots, the following apply:

  • The defender is not constricted or engulfed by another creature.
  • The attacker must be able to see the victim.
  • The defender is not immune to constriction attacks.
  • The defender is not over deep water or lava.

These forms of constriction always hit.

Constriction Immunity

The following monsters are immune:[3]

Player sources:[4]

Maintaining Constriction

While the target is constricted, it will take damage each turn, will be unable to move in any direction, and will suffer a -10 evasion penalty. Attempting to move away will constitute an escape attempt, which for players has a 40% chance to succeed the first time. Subsequent escape attempts increase the chance to 75%, then 100%.


Damage Calculations

The amount of damage inflicted every 10 auts is: 

 (Base damage) * (0.33 + 0.67 * (XL / 27))
  • Base damage: For players constricting in melee, this is equal to 2d[(110 + (25 * XL)) / 81]. When using Borgnjor's Vile Clutch or a wand of roots, it depends of the power of the cast. For monsters, it is the base damage of that particular attack.
  • Experience level modifier: The third factor means that your damage increases linearly with your experience level. A level 27 character will do thrice as much damage as one at level 1.

This damage is then modified as follows:

  • AC reduction: Unlike most melee attacks, constriction is not reduced by a random number between 0 and AC; the damage reduction is a random number between 0 and 1 + AC / 2. This means that constriction bypasses half of the AC.
  • Time scale: The previous formula calculates how much damage you do every 10 auts. That amount needs to be scaled depending on how many auts you have spent in this turn. For example: if you are attacking with a dagger at minimum delay (5 aut), the previous amount will be multiplied by 5/10 (after AC reduction).

Escaping Constriction

Along with simply succeeding at an escape attempt, there are a number of other methods for breaking free:

  • Killing the constrictor.
  • If the constrictor moves from its current tile, constriction ends (even if the destination is still adjacent to the constricted target).
  • Disabling the constrictor with confusion, paralysis, petrification, fear, or unconsciousness immediately breaks constriction.
    • Charming or polymorphing the constrictor also breaks constriction (and likely prevents them from making future attempts).
    • Elyvilon's healing abilities may allow you to pacify the constrictor.
  • Becoming immune to constriction will immediately end the status.
    • Storm Form is immune to constriction.
    • Dragon Form is giant size, so it can only be constricted by tentacled monstrosities.
  • Any source of blinking can get you free.
  • Barachim can hop away, which will always escape constriction.
  • Teleportation will always let you escape constriction.
  • Formicid's shaft ability will always escape constriction.
  • Zin's Sanctuary ability breaks constriction.
  • Ru's Draw Out Power and Power Leap will always escape construction.

History

  • In 0.32, constriction was reworked. Prior to this version:
    • Damage increased over time when applied to monsters.
    • Escape chance for players used a more complex formula, and blinking and related effects did not guarantee escape.
    • Escape chance for monsters did not care about HD.
    • Constriction applied a -3 EV penalty to players and divided monster EV depending on size.
    • Monster melee constriction always applied but dealt less damage.
    • Grasping Roots duration was more variable, and its damage was higher.
    • Player melee constriction cared about Str.
    • All player sources dealt less damage.
  • Since 0.18, to-hit only depends on Dexterity.
  • Prior to 0.12, the duration modifier to damage was applied to players.

References

  1. ↑ actor.cc:740 (0.32.1)
  2. ↑ fight.cc:73 (0.32.1)
  3. ↑ monster.cc:3920 (0.32.1)
  4. ↑ player.cc:6974 (0.32.1)
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