Organic Link Magic

 (生体リンク魔法 Seitai Rinku Mahō) is a Caster Type Magic utilized by Laxus Dreyar and Brain.

Description
This is a technique which returns an appropriate attack, centered around the form of Magic it is connected with. Meaning, if someone attacks what this type of Magic is bound to, the result would be an immediate counter attack. Brain used same kind of Magic to keep his other personality, Zero in "sleeping" condition. If all Oracion Seis members, including himself, were defeated, lines on his face (acting as "locks") disappeared and Zero became active and would be the dominating personality.