Mesmeric Orb

Whenever a permanent becomes untapped, that permanent's controller mills a card.

Haunting Echoes

Exile all cards from target player's graveyard other than basic land cards. For each card exiled this way, search that player's library for all cards with the same name as that card and exile them. Then that player shuffles.

Mind Funeral

Target opponent reveals cards from the top of their library until four land cards are revealed. That player puts all cards revealed this way into their graveyard.

Island

Hedron Crab

Landfall — Whenever a land you control enters, target player mills three cards.

Counterspell

Entering

Put a creature card from a graveyard onto the battlefield under your control. It gains haste until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)

Breaking

Target player mills eight cards.
Fuse (You may cast one or both halves of this card from your hand.)

Breaking // Entering

Memory Erosion

Whenever an opponent casts a spell, that player mills two cards.

Drowned Catacomb

Drowned Catacomb enters tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.

Ponder

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Glimpse the Unthinkable

Ensnaring Bridge

Creatures with power greater than the number of cards in your hand can't attack.

Mana Leak

Counter target spell unless its controller pays {3}.

Phyrexian Arena

At the beginning of your upkeep, you draw a card and you lose 1 life.

Memory Sluice

Target player mills four cards.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Brain Freeze

Target player mills three cards.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)