Key: Daquann1
Character: Wushei
Skill(or transformation): Sharingan T7?!?
How well do you know the source material?(obviously not relevant if it's a transformation): Well
Reasoning:
Moment app/ Final Battle

What is the moment:
After saving Chla's life from Kushala; the special swordsmen was out for blood and approached Wushei looking to claim a body weather it be Chla's or Wushei. As Wushei prepared to engage in a lethal battle with him; he was whisked away to assist Chla with yet another major threat due to thier actions or better yet the actions of Chla.

Tathagata came to there base of operations looking to kill them all, and with Kushala likely on his way it makes the threat of the situation much higher. They are likely fighting on a time limit, and if they manage to bring down Tathagata they'd end Nirvana  right here and now and retake their land from them.

Should they fail the S.S.F would likely be wiped out in one full swoop leaving the only survivor being Chla given his vampiric nature, but Wushei couldn't fully predict the outcome from the battle just yet..