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'Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of lands you control.
'Flying
Whenever Firebird attacks, other attacking creatures get +X/+0 until end of turn, where X is Firebird's power.
'Create an X/X black and green Spirit Warrior creature token, where X is the greatest toughness among creatures you control.
'(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When this Siege enters, search...
'Enchant creature
Enchanted creature has "Whenever this creature attacks, create a 4/4 white Angel creature token with flying that's tapped and attacking. Exile that token at end of combat."
'Flying If it's neither day nor night, it becomes day as this creature enters. Whenever day becomes night or night becomes day, you may pay {1}{R}. If you do, return...
'Return target permanent card from your graveyard to the battlefield, then distribute four +1/+1 counters among any number of creatures and/or Vehicles target player controls.
'Up to two target creatures can't block this turn.
Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
'Gain control of target artifact or creature. Untap it.
'Return target permanent card from your graveyard to the battlefield, then distribute four +1/+1 counters among any number of creatures and/or Vehicles target player controls.
'Bloodthirst 3 (If an opponent was dealt damage this turn, this creature enters with three +1/+1 counters on it.) Flying {R}{R}{R}: Return this card from your graveyard to your hand....
'Create two 4/5 green Spirit creature tokens. For each of them, put your choice of a vigilance counter, a reach counter, or a trample counter on it.