In order to save Chrollo, Feitan was unfortunately attacked. This allowed him to miraculously be reborn in the HP world as a little kid named Severus Snape.
Feitan wanted to say:
"I am a spider, and no one can take anything away from a spider!"
How will the HP world change? Never mind.
PS: Feitan in this article has black hair and black eyes (according to the new version)
PPS: This article is a bit clear, the characters will be a bit broken, the conservative party can press the cross, and the CP is undecided.
PPPS: I sincerely hope Tanzi can be happy in the HP world =v=~~