[quote=@Vec]
<Snipped quote by Master Crim>

Hmmm, can he just have a feeling of sorts? like when you feel something has happened but dont remember what was it?
Although X is a god and he recognized Calcifer when he attacked Hal....
[/quote]

That's because X is the one who wiped Calcifer in the first place. That and he has a Ledger of records.

Edit: seems like 1 vote for each so far.