Skull Key

Available only in Ultima V, Skull Keys could be used to unlock magically locked doors. They were available from only two locations:


 * A tree stump in Minoc, which Shenstone frequented.
 * From Kristi at Serpent's Hold.

Trivia

 * It is possible to get more than 5 keys from Kristi. So long as you never give her your name, you can keep asking her for keys.