Gatecrash

Boros Elite | Creature | Human Soldier | Battalion — Whenever Boros Elite and at least two other creatures attack, Boros Elite gets +2/+2 until end of turn. | Willian Murai

Guardian of the Gateless | Creature | Angel | Flying Guardian of the Gateless can block any number of creatures. Whenever Guardian of the Gateless blocks, it gets +1/+1 until end of turn for each creature it's blocking. | Wesley Burt

Knight of Obligation | Creature | Human Knight | Vigilance Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) | Ryan Barger

Urbis Protector | Creature | Human Cleric | When Urbis Protector enters the battlefield, create a 4/4 white Angel creature token with flying. | Steve Argyle

Cartel Aristocrat | Creature | Human Advisor | Sacrifice another creature: Cartel Aristocrat gains protection from the color of your choice until end of turn. | James Ryman

Vizkopa Confessor | Creature | Human Cleric | Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) When Vizkopa Confessor enters the battlefield, pay any amount of life. Target opponent reveals that many cards from their hand. You choose one of them and exile it. | Ryan Pancoast

Vizkopa Guildmage | Creature | Human Wizard | {1}{W}{B}: Target creature gains lifelink until end of turn. {1}{W}{B}: Whenever you gain life this turn, each opponent loses that much life. | Tyler Jacobson

Fortress Cyclops | Creature | Cyclops Soldier | Whenever Fortress Cyclops attacks, it gets +3/+0 until end of turn. Whenever Fortress Cyclops blocks, it gets +0/+3 until end of turn. | Maciej Kuciara

Ordruun Veteran | Creature | Minotaur Soldier | Battalion — Whenever Ordruun Veteran and at least two other creatures attack, Ordruun Veteran gains double strike until end of turn. (It deals both first-strike and regular combat damage.) | Greg Staples

Sunhome Guildmage | Creature | Human Wizard | {1}{R}{W}: Creatures you control get +1/+0 until end of turn. {2}{R}{W}: Create a 1/1 red and white Soldier creature token with haste. | Eric Deschamps

Truefire Paladin | Creature | Human Knight | Vigilance {R}{W}: Truefire Paladin gets +2/+0 until end of turn. {R}{W}: Truefire Paladin gains first strike until end of turn. | Michael C. Hayes