Bioga

Bioga, also known as Bio 3, is a spell that inflicts negative status on an enemy in the Final Fantasy series. It is the strongest form of Bio.

Final Fantasy VII
Bio 3 is the third spell on the Poison Magic Materia, after Bio and Bio 2. It takes 20,000 AP to learn and 80 MP to cast.

Before Crisis -Final Fantasy VII-
Bioga is a Non-Elemental Magic Materia. It is stronger form of Bio and Biora.

Final Fantasy Tactics
Bioga is cast by an enemy exclusive class called the Rune Knight. The spell can also be cast by Cúchulainn and by Reaver monsters.

Final Fantasy Crystal Chronicles: Ring of Fates
Bioga is cast by piling Fira +1, Blizzara +1, Cura +1, and Clearara +1. It inflicts Poison on the enemy.

Final Fantasy Crystal Chronicles: Echoes of Time
Bioga is cast by stacking two Thunder and two Raise target rings. A large orb of poison manifests, damaging and poisoning enemies.