Rubblebelt Maaka | Creature | Cat | Bloodrush — {R}, Discard Rubblebelt Maaka: Target attacking creature gets +3/+3 until end of turn. | Eric Velhagen
Smelt-Ward Gatekeepers | Creature | Human Warrior | When Smelt-Ward Gatekeepers enters the battlefield, if you control two or more Gates, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. | Daarken
Tajic, Blade of the Legion | Legendary Creature | Human Soldier | Indestructible
Battalion — Whenever Tajic, Blade of the Legion and at least two other creatures attack, Tajic gets +5/+5 until end of turn. | James Ryman
Warleader's Helix | Instant | | Warleader's Helix deals 4 damage to any target and you gain 4 life. | Greg Staples
Fluxcharger | Creature | Weird | Flying
Whenever you cast an instant or sorcery spell, you may switch Fluxcharger's power and toughness until end of turn. | Willian Murai
Ral Zarek | Legendary Planeswalker | Ral | +1: Tap target permanent, then untap another target permanent.
−2: Ral Zarek deals 3 damage to any target.
−7: Flip five coins. Take an extra turn after this one for each coin that comes up heads. | Eric Deschamps
Carnage Gladiator | Creature | Skeleton Warrior | Whenever a creature blocks, that creature's controller loses 1 life.
{1}{B}{R}: Regenerate Carnage Gladiator. | Ryan Barger
Exava, Rakdos Blood Witch | Legendary Creature | Human Cleric | First strike, haste
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
Each other creature you control with a +1/+1 counter on it has haste. | Aleksi Briclot
Gruul War Chant | Enchantment | | Attacking creatures you control get +1/+0 and have menace. | Dave Kendall