
Draconic Roar | Instant | | As an additional cost to cast this spell, you may reveal a Dragon card from your hand.
Draconic Roar deals 3 damage to target creature. If you revealed a Dragon card or controlled a Dragon as you cast this spell, Draconic Roar deals 3 damage to that creature's controller. | Kev Walker

Humble Defector | Creature | Human Rogue | {T}: Draw two cards. Target opponent gains control of Humble Defector. Activate only during your turn. | Slawomir Maniak

Mogis's Warhound | Enchantment Creature | Dog | Bestow {2}{R} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Mogis's Warhound attacks each combat if able.
Enchanted creature gets +2/+2 and attacks each combat if able. | John Severin Brassell

Ordeal of Purphoros | Enchantment | Aura | Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Purphoros.
When you sacrifice Ordeal of Purphoros, it deals 3 damage to any target. | Maciej Kuciara

Ash Zealot | Creature | Human Warrior | First strike, haste
Whenever a player casts a spell from a graveyard, Ash Zealot deals 3 damage to that player. | Eric Deschamps

Smash to Smithereens | Instant | | Destroy target artifact. Smash to Smithereens deals 3 damage to that artifact's controller. | Pete Venters

Seismic Stomp | Sorcery | | Creatures without flying can't block this turn. | Chase Stone

Tenth District Legionnaire | Creature | Human Soldier | Haste
Whenever you cast a spell that targets Tenth District Legionnaire, put a +1/+1 counter on Tenth District Legionnaire, then scry 1. | Victor Adame Minguez

Stormchaser Mage | Creature | Human Wizard | Flying, haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) | Clint Cearley

Frostburn Weird | Creature | Weird | {U/R}: Frostburn Weird gets +1/-1 until end of turn. | Mike Bierek

Bloodtithe Harvester | Creature | Vampire | When Bloodtithe Harvester enters, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")
{T}, Sacrifice Bloodtithe Harvester: Target creature gets -X/-X until end of turn, where X is twice the number of Blood tokens you control. Activate only as a sorcery. | Lucas Graciano

Destructive Revelry | Instant | | Destroy target artifact or enchantment. Destructive Revelry deals 2 damage to that permanent's controller. | Kev Walker

Armed | Sorcery | | Target creature gets +1/+1 and gains double strike until end of turn.
Fuse (You may cast one or both halves of this card from your hand.) | David Palumbo