Dark Écriture: Darkness

Yami no Ecriture: Darkness (闇の文字・"暗黒" Yami no Ekurityūru : Ankoku): is a Yami no Ecriture Spell.

Description
Writing runes on himself, Freed turns into a dark-colored demonic-like creature that increases his strength and allows him to use Darkness Magic spells. Freed calls this a forbidden technique, and uses it only as a last resort after all other attempts at defeating Mirajane's Satan Soul form fail.