Ojutai, Soul of Winter | Legendary Creature | Dragon | Flying, vigilance
Whenever a Dragon you control attacks, tap target nonland permanent an opponent controls. That permanent doesn't untap during its controller's next untap step. | Chase Stone
Harsh Sustenance | Instant | | Harsh Sustenance deals X damage to any target and you gain X life, where X is the number of creatures you control. | Cynthia Sheppard
War Flare | Instant | | Creatures you control get +2/+1 until end of turn. Untap those creatures. | Karl Kopinski
Dromoka, the Eternal | Legendary Creature | Dragon | Flying
Whenever a Dragon you control attacks, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.) | Eric Deschamps
Silumgar, the Drifting Death | Legendary Creature | Dragon | Flying, hexproof
Whenever a Dragon you control attacks, creatures defending player controls get -1/-1 until end of turn. | Steven Belledin
Cunning Strike | Instant | | Cunning Strike deals 2 damage to target creature and 2 damage to target player or planeswalker.
Draw a card. | Clint Cearley
Ethereal Ambush | Instant | | Manifest the top two cards of your library. (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.) | Lius Lasahido
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
Grim Contest | Instant | | Choose target creature you control and target creature an opponent controls. Each of those creatures deals damage equal to its toughness to the other. | Phill Simmer
Atarka, World Render | Legendary Creature | Dragon | Flying, trample
Whenever a Dragon you control attacks, it gains double strike until end of turn. | Karl Kopinski