It is revealed that Muramasa’s primary goal was never to liberate the Zanpakuto, but to use Yamamoto's spiritual pressure to break the seal on his master, Koga Kuchiki.
Successfully manipulates the Zanpakuto spirits to achieve his master's freedom.
Despite the Soul Reapers' efforts, Muramasa succeeds in releasing the seal. The episode ends with the reappearance of Koga Kuchiki, Byakuya's ancestor, who was sealed away centuries ago for his rebellion. Key Characters & Events Bleach Episode 248
Appears to be siding with Muramasa, though his true intentions remain a focal point of mystery during this arc.
To prevent their interference, the Ryujin Jakka (Yamamoto's Zanpakuto spirit) creates a massive wall of fire that traps the captains and Ichigo. It is revealed that Muramasa’s primary goal was
Ichigo, Kenpachi, and other Soul Reapers attempt to break into the cave where Head Captain Yamamoto is being held.
Bleach , titled "Koga's Rebirth" (or "Kouga to be Revived!!!"), is part of the Zanpakuto Unknown Tales filler arc. It originally aired on November 24, 2009. Episode Summary The episode ends with the reappearance of Koga
Struggles against the intense heat of Yamamoto's flames while trying to reach Muramasa. Kouga to be Revived!!! - Bleach Episode 248 Live Reaction