
Fatal Push | Instant | | Destroy target creature if it has mana value 2 or less.
Revolt — Destroy that creature if it has mana value 4 or less instead if a permanent you controlled left the battlefield this turn. | Eric Deschamps

Foundry Hornet | Creature | Insect | Flying
When Foundry Hornet enters the battlefield, if you control a creature with a +1/+1 counter on it, creatures your opponents control get -1/-1 until end of turn. | Christopher Moeller

Gifted Aetherborn | Creature | Aetherborn Vampire | Deathtouch, lifelink | Ryan Yee

Gonti's Machinations | Enchantment | | Whenever you lose life for the first time each turn, you get {E}. (You get an energy counter. Damage causes loss of life.)
Pay {E}{E}, Sacrifice Gonti's Machinations: Each opponent loses 3 life. You gain life equal to the life lost this way. | Daarken

Ironclad Revolutionary | Creature | Aetherborn Artificer | When Ironclad Revolutionary enters the battlefield, you may sacrifice an artifact. If you do, put two +1/+1 counters on Ironclad Revolutionary and each opponent loses 2 life. | Eric Deschamps

Perilous Predicament | Instant | | Each opponent sacrifices an artifact creature and a nonartifact creature. | Ryan Alexander Lee

Sly Requisitioner | Creature | Human Artificer | Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Whenever a nontoken artifact you control is put into a graveyard from the battlefield, create a 1/1 colorless Servo artifact creature token. | Dan Scott

Vengeful Rebel | Creature | Aetherborn Warrior | Revolt — When Vengeful Rebel enters the battlefield, if a permanent you controlled left the battlefield this turn, target creature an opponent controls gets -3/-3 until end of turn. | Tomasz Jedruszek

Hidden Stockpile | Enchantment | | Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, create a 1/1 colorless Servo artifact creature token.
{1}, Sacrifice a creature: Scry 1. | Darek Zabrocki

Tezzeret's Touch | Enchantment | Aura | Enchant artifact
Enchanted artifact is a creature with base power and toughness 5/5 in addition to its other types.
When enchanted artifact is put into a graveyard, return that card to its owner's hand. | Chris Rallis

Weldfast Engineer | Creature | Human Artificer | At the beginning of combat on your turn, target artifact creature you control gets +2/+0 until end of turn. | Sara Winters

Winding Constrictor | Creature | Snake | If one or more counters would be put on an artifact or creature you control, that many plus one of each of those kinds of counters are put on that permanent instead.
If you would get one or more counters, you get that many plus one of each of those kinds of counters instead. | Izzy