At the beginning of your upkeep, if Pyre Zombie is in your graveyard, you may pay {1}{B}{B}. If you do, return Pyre Zombie to your hand. {1}{R}{R}, Sacrifice Pyre Zombie: It deals 2 damage to any target.
Flying Whenever Rith, the Awakener deals combat damage to a player, you may pay {2}{G}. If you do, choose a color, then create a 1/1 green Saproling creature token for each permanent of that color.
You may cast Saproling Symbiosis as though it had flash if you pay {2} more to cast it. Create a 1/1 green Saproling creature token for each creature you control.
Flying When Sawtooth Loon enters the battlefield, return a white or blue creature you control to its owner's hand. When Sawtooth Loon enters the battlefield, draw two cards, then put two cards from your hand on the bottom of your library.
Serra Avatar's power and toughness are each equal to your life total. When Serra Avatar is put into a graveyard from anywhere, shuffle it into its owner's library.
Enchant creature Enchanted creature gets +2/+2. Threshold — As long as seven or more cards are in your graveyard, all creatures able to block enchanted creature do so.