Dark Fira
From Final Fantasy Wiki
Dark Fira is a spell in Crisis Core -Final Fantasy VII-. The spell looks very similar to the Fira spell, but may add the Poison and Silence statuses when used against an enemy. This Materia can only be made when a normal Fira materia is fused either with Poison or Silence materia, or when a mastered Dark Blizzara is fused with a mastered Thundara or Dark Thundara.
