Psychic Strike

Counter target spell. Its controller mills two cards.

Jace's Phantasm

Flying
Jace's Phantasm gets +4/+4 as long as an opponent has ten or more cards in their graveyard.

Flying
Whenever Shriekgeist deals combat damage to a player, that player mills two cards.

Destroy target nonartifact creature. Its controller mills cards equal to that creature's power.

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

Target player mills two cards.
Draw a card.

Exile all creature cards from target player's graveyard. You gain 3 life for each card exiled this way.

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

Counter target artifact or enchantment spell.

Counter target spell. Its controller mills three cards.

Target player mills three cards.
Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Wight of Precinct Six gets +1/+1 for each creature card in your opponents' graveyards.

Target player mills two cards. Draw two cards.

Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn.

Whenever you draw a card, you may have target player mill a card.

Lifelink
When Desperate Bloodseeker enters, target player mills two cards. (They put the top two cards of their library into their graveyard.)

Target player mills five cards.
Cycling {U} ({U}, Discard this card: Draw a card.)