irvo I've been asking that same question since I joined.
:High School Of The Dead Signature by Maszrum:
Name: Nakushita Chi(Lost Power/Or Energy)
Released Form: The Zan splits into two twin zans connected by a chain at the bottom side of the hilts. The length of the chain initialy is 4 feet in length but can shorten or lengthen based on the style of attack and how much reiatsu is channeled into the chain.
Abilities:Nullification: The blades nullify all elemental and kido based attacks as long as one of the blades comes in contact with the attack.
:Tobi Saru(fly away):While holding onto both zans all reiatsu is channeled into the chain and the zan on the right, allowing it to be thrown at high speed toward the oponent. The path of the released zan can be controlled by placing both hands on the remaining twin and thus allowing the imediate return of the twin after the initial attack.