Gyre Sage | Creature | Elf Druid | Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
{T}: Add {G} for each +1/+1 counter on Gyre Sage. | Tyler Jacobson
Ooze Flux | Enchantment | | {1}{G}, Remove one or more +1/+1 counters from among creatures you control: Create an X/X green Ooze creature token, where X is the number of +1/+1 counters removed this way. | Zoltan Boros
Skarrg Goliath | Creature | Beast | Trample
Bloodrush — {5}{G}{G}, Discard Skarrg Goliath: Target attacking creature gets +9/+9 and gains trample until end of turn. | Scott Chou
Sylvan Primordial | Creature | Avatar | Reach
When Sylvan Primordial enters the battlefield, for each opponent, destroy target noncreature permanent that player controls. For each permanent destroyed this way, search your library for a Forest card and put that card onto the battlefield tapped. Then shuffle. | Stephan Martiniere
Biovisionary | Creature | Human Wizard | At the beginning of the end step, if you control four or more creatures named Biovisionary, you win the game. | Ryan Barger
Fathom Mage | Creature | Human Wizard | Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Whenever a +1/+1 counter is put on Fathom Mage, you may draw a card. | Ryan Pancoast
Mystic Genesis | Instant | | Counter target spell. Create an X/X green Ooze creature token, where X is that spell's mana value. | Mike Bierek
Unexpected Results | Sorcery | | Shuffle your library, then reveal the top card. If it's a nonland card, you may cast it without paying its mana cost. If it's a land card, you may put it onto the battlefield and return Unexpected Results to its owner's hand. | Mike Bierek
Biomass Mutation | Instant | | Creatures you control have base power and toughness X/X until end of turn. | Dan Scott
Clan Defiance | Sorcery | | Choose one or more —
• Clan Defiance deals X damage to target creature with flying.
• Clan Defiance deals X damage to target creature without flying.
• Clan Defiance deals X damage to target player or planeswalker. | Daarken
Gruul Ragebeast | Creature | Beast | Whenever Gruul Ragebeast or another creature enters the battlefield under your control, that creature fights target creature an opponent controls. | Dave Kendall
Rubblehulk | Creature | Elemental | Rubblehulk's power and toughness are each equal to the number of lands you control.
Bloodrush — {1}{R}{G}, Discard Rubblehulk: Target attacking creature gets +X/+X until end of turn, where X is the number of lands you control. | Raymond Swanland
Signal the Clans | Instant | | Search your library for three creature cards and reveal them. If you reveal three cards with different names, choose one of them at random and put that card into your hand. Shuffle the rest into your library. | Dave Kendall
Rubblebelt Raiders | Creature | Human Warrior | Whenever Rubblebelt Raiders attacks, put a +1/+1 counter on it for each attacking creature you control. | Chippy
Breeding Pool | Land | Forest Island | ({T}: Add {G} or {U}.)
As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. | Mike Bierek
Stomping Ground | Land | Mountain Forest | ({T}: Add {R} or {G}.)
As Stomping Ground enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. | David Palumbo