Adarkar Sentinel

T: Add U or CU. Spend this mana only to pay cumulative upkeep costs.

This creature can't be blocked by creatures with power 2 or greater as long as defending player controls a snow land.

W, Sacrifice an enchantment: Destroy target enchantment. 3UU: Counter target enchantment spell.

Enchant creature Enchanted creature gets +1/+1. W: Enchanted creature gets +0/+1 until end of turn.

Untap all white creatures you control. Whenever a creature blocks this turn, it gets +0/+1 until end of turn.

Enchant creature Enchanted creature can't be blocked by black creatures. Enchanted creature gets +2/+2 as long as an opponent controls a black permanent.

You gain 1 life. Draw a card at the beginning of the next turn's upkeep.

0: Return this creature to its owner's hand.