A Deva is a celestial being summoned by the quest-level paladin ability Summon Deva. Devas are not as powerful as planetars. Both can use spells, but devas use a much smaller number of spells. They use the same avatar as planetars. A deva and a planetar cannot be summoned at the same time; that is, if you summon a deva, you cannot summon a planetar, and vice versa.