the work of the Devil!!!! (he can alter reality to mislead people, right?)

well - according to strict canon - no.

However he can alter the perception of reality - which for all intents and purposes is the same thing - however should the devil "change" say - molten lead to wine and you drink it - you still end up with a scorched and seared esophagus and a bellyful of lead - you just wouldn't notice it at first.