The Puroboros, also known as Purobolos, is a Soul of Rebirth enemy in Final Fantasy II. They are but a minor danger to the party, and can be felled easily with Ice-elemental weapons and spells. They usually appear in groups of four or in groups of two with other enemies. They should be the last to be defeated in the latter's case.
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Etymology
Pyrobolus is the Latin word for "Bomb".