G

+2: Place 2 1/1 white or black voidspawn energizer creature tokens onto the battlefield with "tap add 1 white or black mana to your mana pool"
-3: pay 2 life return taget creature from exile to your hand
-16: Target opponent gets an emblem with "at the beginning of your upkeep tap 4 land, pay 4 life, and sacrifice 2 creatures"