
Crater's Claws | Sorcery | | Crater's Claws deals X damage to any target.
Ferocious — Crater's Claws deals X plus 2 damage instead if you control a creature with power 4 or greater. | Noah Bradley

Dragon-Style Twins | Creature | Human Monk | Double strike
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) | Wesley Burt

Howl of the Horde | Sorcery | | When you cast your next instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.
Raid — If you attacked this turn, when you cast your next instant or sorcery spell this turn, copy that spell an additional time. You may choose new targets for the copy. | Slawomir Maniak

Jeering Instigator | Creature | Goblin Rogue | Morph {2}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Jeering Instigator is turned face up, if it's your turn, gain control of another target creature until end of turn. Untap that creature. It gains haste until end of turn. | Willian Murai

Rattleclaw Mystic | Creature | Human Shaman | {T}: Add {G}, {U}, or {R}.
Morph {2} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Rattleclaw Mystic is turned face up, add {G}{U}{R}. | Tyler Jacobson

Deflecting Palm | Instant | | The next time a source of your choice would deal damage to you this turn, prevent that damage. If damage is prevented this way, Deflecting Palm deals that much damage to that source's controller. | Eric Deschamps

Mindswipe | Instant | | Counter target spell unless its controller pays {X}. Mindswipe deals X damage to that spell's controller. | Ryan Alexander Lee

Flying Crane Technique | Instant | | Untap all creatures you control. They gain flying and double strike until end of turn. | Jack Wang

Jeskai Ascendancy | Enchantment | | Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn. Untap those creatures.
Whenever you cast a noncreature spell, you may draw a card. If you do, discard a card. | Dan Scott

Mantis Rider | Creature | Human Monk | Flying, vigilance, haste | Johann Bodin

Sage of the Inward Eye | Creature | Djinn Wizard | Flying
Whenever you cast a noncreature spell, creatures you control gain lifelink until end of turn. | Chase Stone

Ankle Shanker | Creature | Goblin Berserker | Haste
Whenever Ankle Shanker attacks, creatures you control gain first strike and deathtouch until end of turn. | Zoltan Boros

Butcher of the Horde | Creature | Demon | Flying
Sacrifice another creature: Butcher of the Horde gains your choice of vigilance, lifelink, or haste until end of turn. | Karl Kopinski

Crackling Doom | Instant | | Crackling Doom deals 2 damage to each opponent. Each opponent sacrifices a creature with the greatest power among creatures that player controls. | Yohann Schepacz

Mardu Ascendancy | Enchantment | | Whenever a nontoken creature you control attacks, create a 1/1 red Goblin creature token that's tapped and attacking.
Sacrifice Mardu Ascendancy: Creatures you control get +0/+3 until end of turn. | Jason Chan

Avalanche Tusker | Creature | Elephant Warrior | Whenever Avalanche Tusker attacks, target creature defending player controls blocks it this combat if able. | Matt Stewart

Savage Knuckleblade | Creature | Ogre Warrior | {2}{G}: Savage Knuckleblade gets +2/+2 until end of turn. Activate only once each turn.
{2}{U}: Return Savage Knuckleblade to its owner's hand.
{R}: Savage Knuckleblade gains haste until end of turn. | Chris Rahn

Temur Ascendancy | Enchantment | | Creatures you control have haste.
Whenever a creature with power 4 or greater enters the battlefield under your control, you may draw a card. | Jaime Jones

Trap Essence | Instant | | Counter target creature spell. Put two +1/+1 counters on up to one target creature. | Raymond Swanland