Poison Field

This spell is almost the same as the Poison spell, only that it creates a field that will poison the first creature stepping on it, even the caster's party! However, it shares the same weakness as the poison-spell, as the poisoned foe can still attack and endanger the caster.

Note that Energy Field was originally an umbrella term for all the types of magical fields: Poison Field, Fire Field, Sleep Field and Lightning Field, and the same spell would be used to create any of them. Later (after Ultima IV), different spells were designed for each of the fields, and the previous Lightning Field came to be known simply as Energy Field. However, at times the four spells are still called "energy field spells".