Invincibility

Invincibility is a spell unique to the Super Nintendo port of Ultima VII.

Description
Casting the Invincibility spell renders the Avatar briefly impervious to all forms of damage, making this incantation an invaluable tool in desperate battles. It lasts for but a brief span of time, however, after which the hero may be injured once again.

Trivia

 * Interestingly, in Ultima VIII and Ultima IX, purple potions so have the same effect as this spell.