
Act of Treason | Sorcery | | Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.) | Matt Stewart

Ember Beast | Creature | Beast | Ember Beast can't attack or block alone. | David Rapoza

Five-Alarm Fire | Enchantment | | Whenever a creature you control deals combat damage, put a blaze counter on Five-Alarm Fire.
Remove five blaze counters from Five-Alarm Fire: It deals 5 damage to any target. | Karl Kopinski

Hellraiser Goblin | Creature | Goblin Berserker | Creatures you control have haste and attack each combat if able. | Karl Kopinski

Massive Raid | Instant | | Massive Raid deals damage to any target equal to the number of creatures you control. | Zoltan Boros

Warmind Infantry | Creature | Elemental Soldier | Battalion — Whenever Warmind Infantry and at least two other creatures attack, Warmind Infantry gets +2/+0 until end of turn. | Greg Staples

Skyknight Legionnaire | Creature | Human Knight | Flying, haste | Anthony Palumbo

Arrows of Justice | Instant | | Arrows of Justice deals 4 damage to target attacking or blocking creature. | James Ryman

Boros Reckoner | Creature | Minotaur Wizard | Whenever Boros Reckoner is dealt damage, it deals that much damage to any target.
{R/W}: Boros Reckoner gains first strike until end of turn. | Howard Lyon

Domri Rade | Legendary Planeswalker | Domri | +1: Look at the top card of your library. If it's a creature card, you may reveal it and put it into your hand.
−2: Target creature you control fights another target creature.
−7: You get an emblem with "Creatures you control have double strike, trample, hexproof, and haste." | Tyler Jacobson

Boros Keyrune | Artifact | | {T}: Add {R} or {W}.
{R}{W}: Boros Keyrune becomes a 1/1 red and white Soldier artifact creature with double strike until end of turn. (It deals both first-strike and regular combat damage.) | Daniel Ljunggren

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