Crumble Undead

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Crumble Undead is a spell that requires a magic level of 39 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, ghost and shades. Crumble Undead is a good way to train magic, as it costs fewer runes than Earth Bolt (same if you are wielding a staff of earth) and hits as hard as Earth Blast.

The spell can only be autocast by 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.

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
InputCost
2Earth rune.png2Air rune.png1Chaos rune.png84
Combo runes
1Chaos rune.png2Dust rune.png78
2Air rune.png1Chaos rune.png2Mud rune.png556
2Air rune.png1Chaos rune.png2Lava rune.png86
2Earth rune.png1Chaos rune.png2Smoke rune.png256
2Earth rune.png1Chaos rune.png2Mist rune.png318
Main-hands
2Earth rune.png1Chaos rune.pngStaff of air.pngAlt74
2Air rune.png1Chaos rune.pngStaff of earth.pngAlt74
1Chaos rune.pngDust battlestaff.png64
1.75Earth rune.png1.75Air rune.png0.88Chaos rune.pngStaff of the dead.pngAlt73
1.7Earth rune.png1.7Air rune.png0.85Chaos rune.pngKodai wand.png71