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Vulnerability is a level 66 Magic spell. When cast on an opponent, their Defence level is reduced by 10%. The spell gives 76 Magic experience per cast and requires 1 Soul, 5 Earth, and 5 Water runes to be cast. The spell can only be cast if their stats haven't already been lowered, meaning you cannot stack stat reduction with multiple spells in a row.

Remember, you cannot use Ancient Magicks or Lunar spells if you are using standard spells.

Cost[edit | edit source]

Spell cost
5Water rune.png5Earth rune.png1Soul rune.png188
Combo runes
5Water rune.png1Soul rune.png5Dust rune.png198
1Soul rune.png5Mud rune.png1,383
5Water rune.png1Soul rune.png5Lava rune.png193
5Earth rune.png1Soul rune.png5Steam rune.png478
5Earth rune.png1Soul rune.png5Mist rune.png698
5Earth rune.png1Soul rune.pngStaff of water.pngAlt163
5Water rune.png1Soul rune.pngStaff of earth.pngAlt168
1Soul rune.pngMud battlestaff.png143