Gleason's Gielinor Guide

Crumble Undead

Released		24 May 2001 (Update)
Members		No
Level		39
Spellbook		Standard
Type		Combat
Experience		24.5
Base max hit		15
Runes		² ² ¹
Casting speed		5 ticks
Description		Hits skeletons, ghosts, shades & zombies hard
Animation

Sound effect

Crumble Undead is a spell on the standard spellbook, requiring level 39 Magic to cast and costing 2 air runes, 2 earth runes, and 1 chaos rune. This spell can only be cast on undead enemies, such as skeletons, zombies, ghosts and shades; trying to cast it a non-undead NPC yields the chatbox message: This spell only affects skeletons, zombies, ghosts and shades.

Crumble Undead can only be autocast by a skull sceptre (i), slayer's staff, slayer's staff (e), staff of the dead, toxic staff of the dead, staff of light, staff of balance, or void knight mace. In particular, the skull sceptre (i) is the only free-to-play weapon that can autocast this spell.

Crumble Undead costs 1 less earth rune than Earth Bolt by default, but can be outdone in damage by all Bolt spells in F2P, depending on magic level and the extent of the monster's elemental weakness; something very common amongst undead monsters. Further, the only method to autocast via the skull sceptre (i) means paying the full rune cost each time, making it inefficient to train with.

Despite requiring chaos runes, chaos gauntlets have no effect on this spell, as they only increase the max hit of Bolt spells.

Crumble Undead is highly useful for fighting Vorkath, as it is capable of instantly killing the zombified spawn it summons during the fight.

The spell is also cheap and convenient for killing the tree spirit in the Lost City quest from a safespot, as both the tree spirit and the zombies that need to be killed during the quest are susceptible to Crumble Undead.

Damage

Crumble undead has a max hit of 15, 18 when paired with the salve amulet (ei).

Calculator

module = Magic damage calculator form=MagicDamageCalc result=MagicDamageResults name = param = spell|Spell|Crumble Undead|hidden|Crumble Undead param = magicStrength|Visible % Magic strength|0|number|-80-100 param = specialModifier|Special modifiers|None|select|None,Slayer helmet (i),Salve amulet (i),Salve amulet (ei),Amulet of avarice (Revenants)|Amulet of avarice (Revenants)=haveForinthrySurge param = haveForinthrySurge|Have Forinthry Surge|false|check|||Forinthry Surge is a buff acquired by defeating the Revenant maledictus while wearing an Amulet of avarice autosubmit = disabled

Please input the data and submit the form.

Maximum hit
Level	Base max hit	Prayer used
Level	Base max hit	None
39	15	15	15	15	15	15

Cost

Spell cost
Input	Cost
² ² ¹	129
Combo runes
¹ ²	121
² ¹ ²	295
² ¹ ²	177
² ¹ ²	249
² ¹ ²	293
Main-hands
² ¹ _Alt	117
² ¹ _Alt	117
¹	105
^1.71 ^1.71 ^0.86 _Alt	110
^1.7 ^1.7 ^0.85	110
Main and off-hands
² ¹	117
¹ _Alt	105
^1.71 ^0.86 _Alt	100
^1.7 ^0.85	100