Conrad Shadowmullet

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.)
{p/u}: Conrad Shadowmullet is unblockable until
end of turn.
{p/b}{p/u}: Conrad Shadowmullet gets +1/+1 until
end of turn.
{p/b}{p/u}{p/w}: Conrad Shadowmullet gets Lifelink and Vigilance until end of turn.