
Alpha Authority | Enchantment | Aura | Enchant creature
Enchanted creature has hexproof and can't be blocked by more than one creature. | Dave Kendall

Crowned Ceratok | Creature | Rhino | Trample
Each creature you control with a +1/+1 counter on it has trample. | Steve Prescott

Experiment One | Creature | Human Ooze | 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.)
Remove two +1/+1 counters from Experiment One: Regenerate Experiment One. | Chase Stone

Hindervines | Instant | | Prevent all combat damage that would be dealt this turn by creatures with no +1/+1 counters on them. | Svetlin Velinov

Miming Slime | Sorcery | | Create an X/X green Ooze creature token, where X is the greatest power among creatures you control. | Svetlin Velinov

Rust Scarab | Creature | Insect | Whenever Rust Scarab becomes blocked, you may destroy target artifact or enchantment defending player controls. | Adam Paquette

Serene Remembrance | Sorcery | | Shuffle Serene Remembrance and up to three target cards from a single graveyard into their owners' libraries. | David Palumbo

Tower Defense | Instant | | Creatures you control get +0/+5 and gain reach until end of turn. | Seb McKinnon

Wasteland Viper | Creature | Snake | Deathtouch
Bloodrush — {G}, Discard Wasteland Viper: Target attacking creature gets +1/+2 and gains deathtouch until end of turn. | Lucas Graciano

Elusive Krasis | Creature | Fish Mutant | Elusive Krasis can't be blocked.
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.) | Wesley Burt

Nimbus Swimmer | Creature | Leviathan | Flying
Nimbus Swimmer enters the battlefield with X +1/+1 counters on it. | Howard Lyon

Simic Charm | Instant | | Choose one —
• Target creature gets +3/+3 until end of turn.
• Permanents you control gain hexproof until end of turn.
• Return target creature to its owner's hand. | Zoltan Boros

Urban Evolution | Sorcery | | Draw three cards. You may play an additional land this turn. | Eytan Zana

Zameck Guildmage | Creature | Elf Wizard | {G}{U}: This turn, each creature you control enters the battlefield with an additional +1/+1 counter on it.
{G}{U}, Remove a +1/+1 counter from a creature you control: Draw a card. | Chase Stone

Merfolk of the Depths | Creature | Merfolk Soldier | Flash (You may cast this spell any time you could cast an instant.) | Scott Chou

Frenzied Tilling | Sorcery | | Destroy target land. Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. | Noah Bradley

Ghor-Clan Rampager | Creature | Beast | Trample
Bloodrush — {R}{G}, Discard Ghor-Clan Rampager: Target attacking creature gets +4/+4 and gains trample until end of turn. | Charles Urbach

Ground Assault | Sorcery | | Ground Assault deals damage to target creature equal to the number of lands you control. | Karl Kopinski

Gruul Charm | Instant | | Choose one —
• Creatures without flying can't block this turn.
• Gain control of all permanents you own.
• Gruul Charm deals 3 damage to each creature with flying. | Zoltan Boros

Skarrg Guildmage | Creature | Human Shaman | {R}{G}: Creatures you control gain trample until end of turn.
{1}{R}{G}: Target land you control becomes a 4/4 Elemental creature until end of turn. It's still a land. | Aleksi Briclot

Burning-Tree Emissary | Creature | Human Shaman | When Burning-Tree Emissary enters the battlefield, add {R}{G}. | Izzy

Gruul Keyrune | Artifact | | {T}: Add {R} or {G}.
{R}{G}: Gruul Keyrune becomes a 3/2 red and green Beast artifact creature with trample until end of turn. | Daniel Ljunggren

Simic Keyrune | Artifact | | {T}: Add {G} or {U}.
{G}{U}: Simic Keyrune becomes a 2/3 green and blue Crab artifact creature with hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.) | Daniel Ljunggren