"... Oh." Well. He's used to people trying to kill him, Phoenix does after all smash demons to bits on a regular basis, but he's not sure how he feels about it being one of Alec's alts.

"Okay. You, or younger you? 'Cause it'd be nice to know who I need to watch out for. And two.. why?"

Okay so there wasn't a 'one', but he's ignoring that.