Hmm.. Change to "target attacking or blocking" and you've got a deal... maybe.

A 16 life differeential is a lot. But wow, to exile a creature. It's the colourlessness of it, more than the low cost, that worries me. The power this gives a deck that intends to win by means other than life (blue mill, maybe?) or even a green poison deck that splashes a bit of lifegain... just too scary.

Though I guess there is the risk that the opponent responds with direct damage and lets this resolve.

It's also really interesting that this somehow feels almost black. What with the reverse drain life.

this card is supposed to be high-risk, high-reward. The WGB wedge is life-paying for tempo and advantage. I could alternatively make it , but that looks really awkward.

Phyrexian mana can be used on anything artifacts can do. Artifacts can exile creatures, it's just really expensive.

Oh my. This is like a fusion of Swords to Plowshares and Dismember.... both of which are highly powerful cards.

P.S. Shouldn't it be "Pharaonic?"

honestly? I don't know.

It used to be instant speed, but instant to exile is too powerful, no matter how high the cost so...

Sorcery speed is still powerful, though 16 life swing should be enough to warrant its risks.

Yeah, I think the huge life swing actually does offset this reasonably. Even in a control deck where the opponent's life doesn't matter, that means the opponent is the beatdown, so giving up 8 of your life to zap a creature is quite hefty.