Preyitors, Izzet Commander

Hexproof, Haste
{u/r}{u/r}{1}{t}: Destroy target non-Izzet
creature.
{r}{u}{x}{t}: Mill X cards, for every card
milled you gain 2 life.
Preyitors, always destroyed anyone who did not follow the simple Izzet rule,
Niv-Izzent must live.