Krosis, the Ascended

Flying, protection from white and from black
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.)
{w}{b}, Pay 5 life: Krosis gets +5/+0 and gains
indestructible until end of turn.
"We were made to dominate. You feel it in
yourself, do you not?"