Aspiring Aeronaut | Creature | Human Artificer | Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aspiring Aeronaut enters the battlefield, create a 1/1 colorless Thopter artifact creature token with flying. | Willian Murai
Nivix Barrier | Creature | Illusion Wall | Flash (You may cast this spell any time you could cast an instant.)
Defender (This creature can't attack.)
When Nivix Barrier enters the battlefield, target attacking creature gets -4/-0 until end of turn. | Mathias Kollros
Separatist Voidmage | Creature | Human Wizard | When Separatist Voidmage enters the battlefield, you may return target creature to its owner's hand. | Jason Rainville
Tower Geist | Creature | Spirit | Flying
When Tower Geist enters the battlefield, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard. | Izzy
Whirler Rogue | Creature | Human Rogue Artificer | When Whirler Rogue enters the battlefield, create two 1/1 colorless Thopter artifact creature tokens with flying.
Tap two untapped artifacts you control: Target creature can't be blocked this turn. | Winona Nelson
Thunderclap Wyvern | Creature | Drake | Flash (You may cast this spell any time you could cast an instant.)
Flying
Other creatures you control with flying get +1/+1. | Jason Felix
Reclusive Artificer | Creature | Human Artificer | Haste (This creature can attack and {T} as soon as it comes under your control.)
When Reclusive Artificer enters the battlefield, you may have it deal damage to target creature equal to the number of artifacts you control. | Cynthia Sheppard