Banishing Knack

Until end of turn, target creature gains "{T}: Return target nonland permanent to its owner's hand."

Compulsive Research

Target player draws three cards. Then that player discards two cards unless they discard a land card.

Grip of Amnesia

Counter target spell unless its controller exiles all cards from their graveyard.
Draw a card.

Careful Study

Battered Golem

Battered Golem doesn't untap during your untap step.
Whenever an artifact enters, you may untap Battered Golem.

Negate

Betrayal

Enchant creature an opponent controls
Whenever enchanted creature becomes tapped, you draw a card.

Welding Jar

Sacrifice Welding Jar: Regenerate target artifact.

Mirran Spy

Flying
Whenever you cast an artifact spell, you may untap target creature.

Merchant Scroll

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

Scatter Arc

Counter target noncreature spell.
Draw a card.

Contact Other Plane

Roll a d20.
1—9 | Draw two cards.
10—19 | Scry 2, then draw two cards.
20 | Scry 3, then draw three cards.

Retraction Helix

Keep Safe

Counter target spell that targets a permanent you control.
Draw a card.

Golem

Stern Lesson

Draw two cards, then discard a card. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")

Golem Foundry

Whenever you cast an artifact spell, you may put a charge counter on Golem Foundry.
Remove three charge counters from Golem Foundry: Create a 3/3 colorless Golem artifact creature token.

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Trinket Mage

When Trinket Mage enters, you may search your library for an artifact card with mana value 1 or less, reveal that card, put it into your hand, then shuffle.