Missing type line.

Paying life is really a black thing - I don't see it making sense in a jeskai card.

Repeat that. We've seen the "pay lifefor something and get it back with lifelink" combination before - in white-black, where it belongs.

If you didn't have quite that many flashback-like effects in this set already, I'd think this would be a good place for it i. e. "You may cast instant and sorcery cards from your graveyard. Whenever you do, that spell deals damage to you equal to its converted mana cost."