Swain, The Vision of Noxus

Vigilance; Extort (Whenever you cast a spell, you
may pay {w/b}. If you do, each opponent loses 1 life
and you gain that much life.)

{1}{b/r}{b/r} Create two 1/1 black Crow creature tokens with flying and vigilance.

Sacrifice 5+X creatures you control to transform Swain, The Vision of Noxus.