Summon

This is a truly potent spell, but it also has to be used with much caution. Casting it summons deadly daemons to destroy the enemies of the spellcaster in a bloody display. The downside of this spell however is, that once this is done, the daemons will turn against the spellcaster, as they are annoyed at being summoned.

It is often safer to find a different way to deal with one's foes.

Note that in Ultima VII and Ultima VII Part Two, the spell did summon other powerful creatures like dragons, as due to unknown limitations, daemons were out of reach.