Ghost Zone's Invasion

Battle(As a Siege enters, choose an opponent to
protect it. You and others can attack it. When this is defeated, exile it, then cast it transformed)[4HP]
When this enters the battlefield, create three colorless 1/1 Spirit creature tokens with Absorb 2
and Flying. If you control a commander,
distribute two +1/+1 counters on up to two
Spirits. Whenever this is dealt damage, you may
pay 3 life. If you do, create a colorless 1/1 Spirit creature token with Absorb 2 and Flying.