Thick Skin is the first Prayer that a player can use. It increases the user's Defence by 2 levels when calculating block chance while activated. It cannot be used with any of the other prayers that provide a defence bonus, Chivalry and Piety included. This is the first prayer available to a player and also the first prayer to affect defence. It becomes unavailable after Rock Skin is unlocked.
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- Originally, Thick Skin was a spell in the EvilMagic spellbook. It was turned into a Prayer when the good and evil versions of the Prayer and Magic skills were each combined.