Crumble Undead

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Crumble Undead
Crumble Undead.png
Released 24 May 2001 (Update)
Members No
Level Magic 39
Spellbook Standard
Type Combat
Experience 24.5
Damage 15
Runes 2Air 2Earth 1Chaos
Casting speed 5 ticks
Description Hits skeletons, ghosts, shades & zombies hard
Crumble Undead.gif
Sound Effect
Crumble Undead icon (mobile).png

Crumble Undead is a standard spell requiring 39 Magic to cast and costs 2 air runes, 2 earth runes and 1 chaos rune. It has a max hit of 15. This spell can only be cast on undead enemies, such as 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, skull sceptre (i) is the only free-to-play weapon that allows to autocast this spell.

Autocasting Crumble Undead costs fewer runes than Earth Bolt (unless a staff of earth or a dust battlestaff are equipped) and hits as hard as Earth Blast.

It is highly recommended against Vorkath, as the spell instantly kills the Zombified Spawn it summons during the fight.

It is also the best method for easily killing the tree spirit in the Lost City quest from a safespot.

Trying to attack a non-undead NPC with Crumble Undead says "This spell only affects skeletons, zombies, ghosts and shades".

The spell can always be paired with the salve amulet (ei), increasing its max hit to 18.

Cost[edit | edit source]

Spell cost
2Earth rune.png2Air rune.png1Chaos rune.png102
Combo runes
1Chaos rune.png2Dust rune.png94
2Air rune.png1Chaos rune.png2Mud rune.png256
2Air rune.png1Chaos rune.png2Lava rune.png104
2Earth rune.png1Chaos rune.png2Smoke rune.png270
2Earth rune.png1Chaos rune.png2Mist rune.png256
2Earth rune.png1Chaos rune.pngStaff of air.pngAlt92
2Air rune.png1Chaos rune.pngStaff of earth.pngAlt92
1Chaos rune.pngDust battlestaff.png82
1.71Earth rune.png1.71Air rune.png0.86Chaos rune.pngStaff of the dead.pngAlt88
1.7Earth rune.png1.7Air rune.png0.85Chaos rune.pngKodai wand.png87