Difference between revisions of "Lightning rod"

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{{item
 
{{item
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  |itemtype = Rod
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  |itemtype=Miscellaneous item
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  |name = Lightning rod
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  |name=lightning rod
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  |cost = ?
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  |cost=1100
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  |weight = 13
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  |weight=10
 
}}
 
}}
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{{flavour|Once, a wizard ignorant of the workings of mundane items misunderstood the purpose of lightning rods. Instead of making one that merely drew lightning, he made one that created it instead.<br><br>This rod shoots continuous lightning: the discharge is sustained, and can be redirected to new targets by evoking the rod in subsequent turns (failing to do so will release the trigger). The rod takes a moment to warm up, making short bursts rather ineffective. Once the zap is active, one can wave the rod, creating impressive and damaging arcs of electricity.}}
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{{flavour|A rod that allows its wielder to fire unavoidable blasts of lightning. Consecutive evocations cause the discharge to be sustained, which increases the power level up to four times and allows the blast to be redirected to affect an area.}}
  
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Much like the [[rod of striking]], the '''lightning rod''' is an unusual [[rod]] in that it only contains a single spell. The first time you evoke it, it fires a weak, medium-range [[Lightning Bolt]], almost as though you'd just evoked a less-powerful [[wand of lightning]]. However, if your next action is to evoke it a second time, the effect is different: targeting the same tile you initially attacked will create a more powerful bolt, while targeting a different tile will create a wide spray of unavoidable lightning, damaging everything in between. Doing anything except for evoking the rod again will reset the rod, causing the next bolt you fire to be another low-power bolt. The damage of this rod is very variable; targeting smaller areas tends to deal more damage. The [[MP]] cost of firing this rod is 2 for the initial zap, and 5, or all the charges if there are less than 5, for any consecutive zap. The damage of this rod depends on three parameters: your Evocations skill, how many charges are being consumed by the current use, and the length of the current arc:
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The '''lightning rod''' is a powerful source of area-of-effect [[electricity]] damage, though it requires multiple turns to use properly.
  
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{{crawlquote|'''Damage:''' NdM, where N is the mana cost of this zap, and M is (30 + Rod_power/6)/(2+arc_length)<br>
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==Useful Info==
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'''To-hit:''' 10 + Rod_power/20, for the initial use; 1000, after that}}
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When first used, the lightning rod fires a weak, range-5, unavoidable Thunderbolt. Unlike [[Lightning Bolt]], this does not bounce off walls. If your next action is to evoke it again, the rod becomes stronger. Targeting the same tile will create a stronger bolt. Targeting a different tile will create a wide arc of electricity, covering the area between the 1st and 2nd bolts. The more tiles you cover, the weaker the bolt.
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Note: Rod_power=5 + 3 × Evocations; Arc_length is the aperture of the beam in tiles at the given radius. Its value is always at least 1.
 
  
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Training [[Evocations]] increases the damage output and reduces the hunger cost of evoking this rod.
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Each successive use makes the attack stronger. Doing anything except for evoking the rod again will reset the rod, causing the next bolt you fire to be another low-power bolt.
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It comes with 4 charges, which, once used, will be replenished one-by-one as you gain experience while the rod is in your inventory.
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Damage is dependent on Evocations skill, how many turns the rod was used consecutively, and the length of the current arc. It is calculated as follows:
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* '''Damage''' = Uses dice notation, NdM, with the following variables:
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** '''N''' = <code>2 + (# Previous Uses)</code><ref>{{source ref|0.30.0|spl-damage.cc|2980}}</ref><ref>{{source ref|0.30.0|spl-data.h|L2072}}</ref> (min. 2; max. 5)
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** '''M''' = <code> (0.75 * [[Evocations]] + 46.25) / (arc + 2) </code> <ref>{{source ref|0.30.0|spl-damage.cc|3035}}</ref><ref>{{source ref|0.30.0|evoke.cc|139}}</ref>
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:: For arc = Aperture of the beam, in tiles, at the given radius. Its value is always at least 1. Note that arc length is measured for each individual tile. This means that, when spreading out the beam, enemies closer to you take more damage (as the arc is tighter).
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Like with other miscellaneous evocables, only 1 lightning rod will spawn in a given game.
  
 
==Strategy==
 
==Strategy==
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*Lightning rods can deal heavy damage to single targets, but are also excellent for wiping out large packs of enemies, such as [[ugly thing]]s and [[slime creature]]s. To maximize damage, try to minimize the area you affect. Ignoring one monster that's several tiles away from the body of the pack may leave it unharmed, but you'll do much more damage to all the other monsters.
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A lightning rod can deal heavy, ''unavoidable'' damage. This makes it a great item to finish off enemies, or deal with evasive enemies like [[Agnes]]. It is also great at wiping out large packs of enemies, such as [[ugly thing]]s and [[slime creature]]s.
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To maximize the damage per target, you should minimize the area you affect. For example, you may want to ignore a monster that's several tiles away from the others. You'll leave that monster completely unharmed, but will deal much more damage to the rest of the pack.
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Can pair well with a [[scroll of immolation]]. Immolation's Inner Flame creates a [[flame cloud]] no matter how much damage you deal, so even wide arcs of lightning can deal lots of damage. Plus, you'll get all explosions at the end.
  
 
==History==
 
==History==
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Lightning rods were added to ''Crawl'' in [[0.11]].
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*Prior to [[0.30]], the lightning rod dealt x66% as much damage, Nd(<code>0.5 * [[Evocations]] + 30.83</code>).
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*Prior to [[0.20]], this item was a [[rod]], cost the rod's MP to use, and had to be wielded prior to use. Damage was based on how much MP was used, rather than the number of consecutive uses.
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*Lightning rods were added in [[0.11]].
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==References==
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<references/>
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{{Evocables}}

Latest revision as of 04:11, 23 November 2023

Version 0.30: This article may not be up to date for the latest stable release of Crawl.
Type Miscellaneous item
Name lightning rod
Icon Lightning rod.png
A rod that allows its wielder to fire unavoidable blasts of lightning. Consecutive evocations cause the discharge to be sustained, which increases the power level up to four times and allows the blast to be redirected to affect an area.

The lightning rod is a powerful source of area-of-effect electricity damage, though it requires multiple turns to use properly.

Useful Info

When first used, the lightning rod fires a weak, range-5, unavoidable Thunderbolt. Unlike Lightning Bolt, this does not bounce off walls. If your next action is to evoke it again, the rod becomes stronger. Targeting the same tile will create a stronger bolt. Targeting a different tile will create a wide arc of electricity, covering the area between the 1st and 2nd bolts. The more tiles you cover, the weaker the bolt.

Each successive use makes the attack stronger. Doing anything except for evoking the rod again will reset the rod, causing the next bolt you fire to be another low-power bolt.

It comes with 4 charges, which, once used, will be replenished one-by-one as you gain experience while the rod is in your inventory.

Damage is dependent on Evocations skill, how many turns the rod was used consecutively, and the length of the current arc. It is calculated as follows:

  • Damage = Uses dice notation, NdM, with the following variables:
For arc = Aperture of the beam, in tiles, at the given radius. Its value is always at least 1. Note that arc length is measured for each individual tile. This means that, when spreading out the beam, enemies closer to you take more damage (as the arc is tighter).

Like with other miscellaneous evocables, only 1 lightning rod will spawn in a given game.

Strategy

A lightning rod can deal heavy, unavoidable damage. This makes it a great item to finish off enemies, or deal with evasive enemies like Agnes. It is also great at wiping out large packs of enemies, such as ugly things and slime creatures.

To maximize the damage per target, you should minimize the area you affect. For example, you may want to ignore a monster that's several tiles away from the others. You'll leave that monster completely unharmed, but will deal much more damage to the rest of the pack.

Can pair well with a scroll of immolation. Immolation's Inner Flame creates a flame cloud no matter how much damage you deal, so even wide arcs of lightning can deal lots of damage. Plus, you'll get all explosions at the end.

History

  • Prior to 0.30, the lightning rod dealt x66% as much damage, Nd(0.5 * Evocations + 30.83).
  • Prior to 0.20, this item was a rod, cost the rod's MP to use, and had to be wielded prior to use. Damage was based on how much MP was used, rather than the number of consecutive uses.
  • Lightning rods were added in 0.11.

References

  1. ↑ spl-damage.cc:2980 (0.30.0)
  2. ↑ spl-data.h:L2072 (0.30.0)
  3. ↑ spl-damage.cc:3035 (0.30.0)
  4. ↑ evoke.cc:139 (0.30.0)
Miscellaneous Evocables
Figurine of a ziggurat • Horn of Geryon • Lightning rod • Phantom mirror
Phial of floods / Gell's gravitambourine • Condenser vane / Tin of tremorstones • Box of beasts / Sack of spiders
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