Keeper of Dark Promises

First strike, menace
Aetherize 2 (When this creature dies, add two mana of any one of the colors printed on this card to your mana pool. Mana added this way does not empty from your mana pool as steps and phases end.)
{b/g}{u/b}, {t}: Remove one counter of any kind from a permanent you control. Draw a card, then put a +1/+1 counter on target creature you control.