Keeper of Progenitus

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

2W, T, Sacrifice a green creature, a white creature, and a blue creature: Search your library for a card named Empyrial Archangel, put it onto the battlefield, then shuffle.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) Whenever a creature you control attacks alone, you may tap target creature.

Prevent all combat damage that would be dealt this turn. Cycling 2 (2, Discard this card: Draw a card.)

G, T: Target creature gains trample until end of turn. U, T: Target creature gains flying until end of turn.

Flying Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) Whenever a creature you control attacks alone, it gains lifelink until end of turn.

Whenever you gain life, you may pay 1W. If you do, put a +1/+1 counter on target creature for each 1 life you gained.

2W, T, Sacrifice this artifact: Destroy target artifact or enchantment.