
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

Bone to Ash | Instant | | Counter target creature spell.
Draw a card. | Clint Cearley

Dreadwaters | Sorcery | | Target player mills X cards, where X is the number of lands you control. | Cliff Childs

Jace's Sanctum | Enchantment | | Instant and sorcery spells you cast cost {1} less to cast.
Whenever you cast an instant or sorcery spell, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Adam Paquette

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

Talent of the Telepath | Sorcery | | Target opponent reveals the top seven cards of their library. You may cast an instant or sorcery spell from among them without paying its mana cost. Then that player puts the rest into their graveyard.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may cast up to two instant and/or sorcery spells from among the revealed cards instead of one. | Peter Mohrbacher

Thopter Spy Network | Enchantment | | At the beginning of your upkeep, if you control an artifact, create a 1/1 colorless Thopter artifact creature token with flying.
Whenever one or more artifact creatures you control deal combat damage to a player, draw a card. | Jung Park

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