Steal

The Sosarian spell Steal is exactly what is says.

Spell Description
Casting this spell causes the stealing abilities of the caster to vastly improve, thus making thievery much easier. It however is not useful to directly steal items. Needless to say that usage of this spell violates several laws and thus is considered illegal.

Trivia

 * The spell does only exist in the original Apple II version of Ultima I.
 * Despite being removed in the remake, in at least the DOS-port it's still found in the data structure; in the Out.exe at 0xF973.