Thick Skin

Thick Skin is a runic spell that appears in Ultima Underworld II.

Spell Description
The Avatar could learn this spell by studying the long-abandoned notes of the magician Alorik in the ruined city of Anodunos. Casting it would grant the hero a level of mystical protection greater than that afforded by the Resist Blows spell, although not as great as that which could be attained through the vastly more advanced spell Iron Flesh.

Trivia

 * Purple potions of Thick Skin feature frequently in the game, and may be purchased from the Killorn merchant, Merzan.