Satan Soul: Sitri

Satan Soul: Sitri is a Take Over Spell.

Description
A form of Satan Soul which, much like its normal counterpart, allows its user to take over the appearance, abilities and powers of a demonic being. It was described by Erza Scarlet as being the strongest spell in Mirajane Strauss' possession.

When she activates this technique, her clothes are replaced by ones that are more revealing. She grows horns on the side of her head and she also grows a lot more hair. Her hands become a pair of claws and dark-colored markings appear on her legs. She is surrounded by what appears to be flames which her feet seem to be merged to.

Special Features
Enhanced Strength: When employing this demonic form, Mirajane's strength is greatly increased. She managed to defeat Jenny Realight, who was in her battle form, in one hit.

Trivia

 * "Prince Sitri", in Goetia, is a Great Prince of Hell, and reigns over sixty legions of demons.