name: koibimaru
regular form: wooden sword looks weak compared to standard metal zanbaktou but when it strikes an enemy it absorbs the type of spirit energy used for the body's physical resistance from blows to that spot of the body so in reality it does more damage than a regular zanbaktou

shikai: wide edge katana with glowing purple eyes at the blade

comand:koibimaru, enlighten
abilities: absorbs spirit energy from opponent and suroundings through purple glowing eyes at base of the blade, can summon chains of darkness and controll them, the shinigami's speed increases
bankai: to transform other than the main command "bankai" the blade absorbs a huge amount of spirit energy from the area, anyone in the area, and the shinigami himself once it transforms the blade doesnt absorb anymore energy but it creates its own transfering it to the shinigami so the longer he stays in battle the stronger they get. the blade also has a barely seeable aura that appears as red cherry blossom pedals but only the shinigami can see them.

abilities:energy creation/energy replenish, after slash side affect from the pedals, other than that only strong defence and power