Claws of Guthix is a combat spell in the standard spellbook. Casting it requires a Magic level of 60 in addition to having either a guthix staff or a void knight mace equipped. Casting it uses 1 fire rune, 2 blood runes and 4 air runes each cast. The spell is unlocked by completing the Mage Arena activity; it has to be cast 100 times within the arena itself in order to be used anywhere else. Upon a successful hit, Claws of Guthix has the chance of lowering the target's Defence by 5%.
