Fierce Invocation | Sorcery | | Manifest the top card of your library, then put two +1/+1 counters on it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.) | Tyler Jacobson
Flamerush Rider | Creature | Human Warrior | Whenever Flamerush Rider attacks, create a token that's a copy of another target attacking creature and that's tapped and attacking. Exile the token at end of combat.
Dash {2}{R}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.) | Min Yum
Hungering Yeti | Creature | Yeti | As long as you control a green or blue permanent, you may cast Hungering Yeti as though it had flash. (You may cast it any time you could cast an instant.) | Tyler Jacobson
Lightning Shrieker | Creature | Dragon | Flying, trample, haste
At the beginning of the end step, Lightning Shrieker's owner shuffles it into their library. | Slawomir Maniak
Pyrotechnics | Sorcery | | Pyrotechnics deals 4 damage divided as you choose among any number of targets. | Matt Stewart
Cunning Strike | Instant | | Cunning Strike deals 2 damage to target creature and 2 damage to target player or planeswalker.
Draw a card. | Clint Cearley
Kolaghan, the Storm's Fury | Legendary Creature | Dragon | Flying
Whenever a Dragon you control attacks, creatures you control get +1/+0 until end of turn.
Dash {3}{B}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.) | Jaime Jones