Rhazk, Argent Archpriest

Defender, First Strike
Whenever a nonhuman creature an opponent controls dies, you gain life equal to that creature's converted mana cost.
Delirium - At the beginning of your upkeep, if there are four or more card types among cards in your graveyard, you may pay {3}{u}{u}. If you do, Human creatures you control get +0/+2 and have Hexproof until end of turn.