[zalas]

Originally Posted by tun

Spoiler:

I don't like how Yuji can finally use his powers all of a sudden. It reaks of plot convenience for him to just show up and suddenly pull the powers out of his ass. There has to be some sort of trigger that allows him to use them. It can't be because someone he knows is in trouble because that's happened already and he hasn't been able to do anything. I need answers!

According to the Japanese wiki, if I read it correctly,

Spoiler for wiki:

Yuuji supposedly took in a fragment of Sydonai (his hand) when he was probing him for the Midnight Stray. He gains some powers thereafter because of that.