Astral Steel

Defender (This creature can't attack.) Flying When this creature blocks, it becomes a Bird Giant, and it loses defender. (It's no longer a Wall. This effect lasts indefinitely.)

Flying Whenever a permanent is turned face up, put a +1/+1 counter on this creature.

Flying Morph 3W (You may cast this card face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.) When this creature is turned face up, target creature you control gains protection from the color of your choice until end of turn.

Whenever a Cleric creature you control becomes the target of a spell or ability, it gets +0/+2 until end of turn.

Soldier spells you cast cost 1 less to cast. Soldier creatures you control get +1/+2.

Flying Prevent all damage that would be dealt to this creature.

Create X 4/4 white Angel creature tokens with flying. Cycling 2W (2W, Discard this card: Draw a card.) When you cycle this card, you may pay X. If you do, create X 1/1 white Soldier creature tokens.

Exile all permanents. For as long as any of those cards remain exiled, at the beginning of each player's upkeep, that player returns one of the exiled cards they own to the battlefield.