Sol Ring

Hedron Crab

Landfall — Whenever a land you control enters, target player mills three cards. (They put the top three cards of their library into their graveyard.)

Ancient Crab

Ambassador Laquatus

Teferi's Tutelage

When this enchantment enters, draw a card, then discard a card.
Whenever you draw a card, target opponent mills two cards. (They put the top two cards of their library into their graveyard.)

Curse of the Bloody Tome

Enchant player
At the beginning of enchanted player's upkeep, that player mills two cards.

Archmage Emeritus

Magecraft — Whenever you cast or copy an instant or sorcery spell, draw a card.

Venture Deeper

Target player mills four cards. (Then exile this card. You may cast the creature later from exile.)

Merfolk Secretkeeper

Merfolk Secretkeeper // Venture Deeper

Faerie Vandal

Flash (You may cast this spell any time you could cast an instant.)
Flying
Whenever you draw your second card each turn, put a +1/+1 counter on this creature.

Rapid Hybridization

Destroy target creature. It can't be regenerated. That creature's controller creates a 3/3 green Frog Lizard creature token.

Arcane Signet

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

Millstone

Heartstone

Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Prosperity

Aegis Turtle

Fractured Sanity

Each opponent mills fourteen cards.
Cycling {1}{U} ({1}{U}, Discard this card: Draw a card.)
When you cycle this card, each opponent mills four cards.

Amphin Cutthroat

Sapphire Medallion

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

Miscast

Counter target instant or sorcery spell unless its controller pays {3}.

Tome Scour

Thought Vessel

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

Mind Sculpt

Fascination

Choose one —
• Each player draws X cards.
• Each player mills X cards.

Drowned Secrets

Whenever you cast a blue spell, target player mills two cards.

Tormod's Crypt

{T}, Sacrifice this artifact: Exile target player's graveyard.

Counterspell

Bay Falcon

Psychic Corrosion

Whenever you draw a card, each opponent mills two cards.

Merfolk Mesmerist

Armored Whirl Turtle

Silver Myr

Negate

Didn't Say Please

Counter target spell. Its controller mills three cards.

Ingenious Thief

Flying
When this creature enters, look at target player's hand.

Countermand

Counter target spell. Its controller mills four cards.

Ruin Crab

Landfall — Whenever a land you control enters, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.)

Sands of Delirium

Thought Scour

Target player mills two cards.
Draw a card.

Keening Stone

{5}, {T}: Target player mills X cards, where X is the number of cards in that player's graveyard.

Thran Dynamo

Pongify

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