Regice, Blizzardborn Golem

You may sacrifice a blue creature you control while casting this card to pay for {3}.
Blizzard At the beginning of each upkeep. Regice, Blizzardborn Golem deals 1 damage to each white, black, red, green, and colorless creature.
{2}{u}: Tap target creature. It doesn't untap during its controller's next untap step. Activate this ability only once each turn.