Sram, Senior Edificer

Whenever you cast an Aura, Equipment, or Vehicle spell, draw a card.

Sram's Expertise

Servo

Create three 1/1 colorless Servo artifact creature tokens.
You may cast a spell with mana value 3 or less from your hand without paying its mana cost.

Thopter Arrest

When this enchantment enters, exile target artifact or creature an opponent controls until this enchantment leaves the battlefield.

Energy Reserve

Aether Swooper

Flying
When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}{E}. If you do, create a 1/1 colorless Servo artifact creature token.

Aethertide Whale

Flying
When this creature enters, you get six {E} (energy counters).
Pay {E}{E}{E}{E}: Return this creature to its owner's hand.

Baral, Chief of Compliance

Instant and sorcery spells you cast cost {1} less to cast.
Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.

Baral's Expertise

Return up to three target artifacts and/or creatures to their owners' hands.
You may cast a spell with mana value 4 or less from your hand without paying its mana cost.

Aether Inspector

Vigilance
When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}{E}. If you do, create a 1/1 colorless Servo artifact creature token.

Bastion Inventor

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Disallow

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

Dispersal Technician

When this creature enters, you may return target artifact to its owner's hand.

Efficient Construction

Thopter

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying.

Hinterland Drake

Flying
This creature can't block artifact creatures.

Ice Over

Enchant artifact or creature
Enchanted permanent doesn't untap during its controller's untap step.

Illusionist's Stratagem

Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.
Draw a card.

Leave in the Dust

Return target nonland permanent to its owner's hand.
Draw a card.

Aether Revolt