Charm

Some mages don't want to dirty their own hands in battle, so they use Charm spell.

Spell Description
Casting this spell forces the weaker minded enemy under the caster's control, allowing them to use their new puppet to attack other foes. This spell only works on one creature, and stronger willed foes will be able to resist it completely. Thus, it is to be used with caution. The effect is only temporarily and wears off after some time. By the time of Ultima IX, this spell works as long as there is mana left, as it consumes it constantly. Once mana runs out, the charmed creature turns against the caster. The Crook of Charming has the same effect, but without using up the mage's mana.

The more powerful variant of this spell is Mass Charm, which will lead to an entire group of foes battling each other to the death.

Trivia

 * In Lynn Abbey's Ultima Saga, Squirt finds the hiding place of the wizard Annon. Mistaking him for a demon, the boy began knocking magic paraphernalia form the shelves. Hastily, the mage charmed the boy using An Xen Ex, which had the side effect of calming the boy's normally hyperactive mind.
 * Daemons love to use this spell to turn the party against each other.