Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Foundry Inspector

Artifact spells you cast cost {1} less to cast.

Propaganda

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Dramatic Reversal

Untap all nonland permanents you control.

Sol Ring

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Counterspell

Island

Leyline Axe

If this card is in your opening hand, you may begin the game with it on the battlefield.
Equipped creature gets +1/+1 and has double strike and trample.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Urza, Lord High Artificer

When Urza, Lord High Artificer enters, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."
Tap an untapped artifact you control: Add {U}.
{5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

Sapphire Medallion

Blue spells you cast cost {1} less to cast.

Refute

Counter target spell. Draw a card, then discard a card.

Unwinding Clock

Untap all artifacts you control during each other player's untap step.

Pongify

Destroy target creature. It can't be regenerated. Its controller creates a 3/3 green Ape creature token.

Command Tower

Tezzeret the Seeker

+1: Untap up to two target artifacts.
−X: Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
−5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.

Thought Vessel

You have no maximum hand size.
{T}: Add {C}.

Negate

Scrawling Crawler

At the beginning of your upkeep, each player draws a card.
Whenever an opponent draws a card, that player loses 1 life.