Darkra

Darkra is a recurring Dark-elemental spell in the series. It is the second form of the Dark spell.

Final Fantasy XII
Darkra is a Arcane Magick from Final Fantasy XII, that causes moderate Dark-elemental damage. The spell requires the Arcane Magick 4 license for 50 LP and costs 20 MP to cast. The spell can be purchased in the Phon Coast for 5,800 gil.

In the International Zodiac Job System, the Arcane Magick Licenses have been reduced to two. Dark and Darkra are both Arcane Magick 1 License which costs 40 LP.

Final Fantasy Tactics A2: Grimoire of the Rift
Darkra is not accessible to the player, but is part of the Dark Magick skillset used by Ghost enemies.

Final Fantasy: The 4 Heroes of Light
Darkra is a moderate level Black Magic spell. The spell costs 3 AP to cast and it has a spell power of 12. It can only be used if the Darkra Tome item is in the character's inventory. The spell can only be purchased in Invidia for 1,500 gil.