Lee's Rapid Deconstruction

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Version 0.30: This article may not be up to date for the latest stable release of Crawl.
Lee's rapid deconstruction.png Lee's Rapid Deconstruction
Level 5
School1 Earth
Source(s) Book of the Earth
Book of Iron
Casting noise 4
Spell noise 20
Power Cap 200
Range LOS
Flags Target
Fragments a wall or a suitably brittle visible monster into an explosion of deadly shrapnel. It can be used on monsters made of ice, bone, or any wall-like substance, as well as those turned to stone by petrification. Its damage is strongly reduced by armour.

Targets made from rock, stone, ice or bone will cause a small explosion. Metal targets will cause a small but more damaging explosion, and targets made from crystal will cause a large and more damaging explosion.


“Now the house was full of men and women; and all the lords of the Philistines
were there; and there were upon the roof about three thousand men and women,
that beheld while Samson made sport.

And Samson called unto the LORD, and said, O Lord GOD, remember me, I pray
thee, and strengthen me, I pray thee, only this once, O God, that I may be at
once avenged of the Philistines for my two eyes.

And Samson took hold of the two middle pillars upon which the house stood, and
on which it was borne up, of the one with his right hand, and of the other
with his left.

And Samson said, Let me die with the Philistines. And he bowed himself with
all his might; and the house fell upon the lords, and upon all the people that
were therein. So the dead which he slew at his death were more than they which
he slew in his life.”
-KJV Bible, Judges 16:27-30.

Spell Details
Damage Formula Nd(5+Power/5) (see damage formula)
Max Damage 4d45
Max Power 200
Range LOS
Targeting Smite
To-hit
Special Explosion
Triple AC damage reduction

Lee's Rapid Deconstruction (LRD) is a level 5 Earth Magic spell which causes walls and certain monsters to spew shrapnel, damaging nearby enemies and the target itself, if it is a monster.

Useful Info

Targeting

Lee's Rapid Deconstruction is smite-targeted; it can target virtually any solid wall within LOS, as well as doors, statues, and empty archways (such as those left behind by a closed portal). LRD cannot target objects behind transparent walls, nor can it target trees.

LRD can also target creatures made from hard or brittle substances. These include:

After a target is selected, LRD creates an explosion centered on the target. The size and damage depends on the target's material. This explosion cannot hit monsters behind a line of walls, but it can hit monsters out of line of sight (around a corner, through fog, too far away).

Damage Formula

LRD deals Nd(5 + Power / 5) damage, where N depends on the substance of the material.

Usually, LRD's damage is reduced by AC 3 times, as a function of "BEAM_FRAG" damage.

  • When targeting a monster, the damage done to the target ignores AC completely. Surrounding monsters still get the usual 3x AC reduction, unless it is an ice explosion.
  • If the target is a monster made of ice, the explosion deals "BEAM_ICE" damage instead. This explosion only suffers 1x AC reduction, but the damage can be resisted by cold resistance. The target still takes untyped damage instead of cold damage.

Radius and Number of Dice

Target Radius N
Toenail golems 1 3
Iron golems, peacekeepers, and war gargoyles 1 4
Earth elementals, saltlings, ushabtiu, statues, and gargoyles 1 3
Orange crystal statues, obsidian statues, Roxanne, and crystal guardians 2 4
Petrifying or petrified monsters 1 3
Icy or skeletal monsters 1 3
Rock walls, stone walls, granite statues 1 3
Iron grates 1 4
Metal walls 1 4
Crystal walls 2 4
Doors, stone arches 1 3
Petrified or petrifying player, Statue Form, Ice Form 1 3
Gargoyle player 1 2

Strategy

Lee's Rapid Deconstruction is similar to casting Sandblast, with perfect accuracy, better range, and a 3x3 explosion. It's excellent for wiping out packs of unarmoured or high-EV opponents, like kobold vaults or swarms of killer bees. Since the damage reduction from AC is applied 3 times, it is far less effective against high-AC enemies, like orc warriors.

Overall, LRD is a moderately viable attack spell throughout most of the game. Against single targets or high AC targets, Iron Shot is likely better, though that's a higher level spell.

Tips & Tricks

  • You can use LRD to hit dangerous creatures behind their allies. Either target the walls beside your target, or target a monster that's vulnerable to LRD. For example, you can use a necromancer's skeletons against it.
  • Because the shrapnel affects everything within range of the targeted object, you can cast LRD on a wall to blast anything lurking on the other side that you don't want in your LOS (e.g. oklob plants).
  • While using LRD on a petrified (or petrifying) enemy will ignore all their AC, the petrified status will reduce all damage by 50%. It's usually better to target a wall against unpetrified enemy. You can petrify an enemy to hit a group of enemies, or petrify a monster if it's not near a wall.
  • A wand of acid can be used to lower enemy AC, greatly increasing the effectiveness of LRD.

Monster Version

The monster version is identical to the player version. While in the presence of monsters that can cast LRD, Transmuters should avoid entering Ice or Statue Form. Other characters should do everything possible to avoid being petrified. As Gargoyles are always vulnerable, they should do what they can to avoid these monsters entirely, or failing that, to kill them as quickly as possible.

The following enemies cast Lee's Rapid Deconstruction:

History

  • Prior to 0.28, LRD could not target indestructible walls.
  • Prior to 0.22, LRD had the ability to destroy walls.
  • Prior to 0.21, LRD would cause a larger, more damaging explosion when it destroyed a wall or monster. The chance for metal walls to break depended on spell power, and for crystal it was 50% instead of 33%.
  • Prior to 0.14, this spell had a chance to instantly destroy skeletal monsters and statues.
  • Prior to 0.10, LRD could be cast on an unnaturally hard rock wall to damage monsters on the other side. After 0.10, monsters will not be damaged if the wall is not capable of being shattered under any circumstances.