Keyword: Mill

Intimidate (This creature can’t be blocked except by artifact creatures and/or creatures that share a color with it.)
: Put target artifact or creature card with converted mana cost X from an opponent’s graveyard onto the battlefield under your control tapped. Then that player mills X cards.

Equipped creature gets +2/+2 and has protection from green and from blue.
Whenever equipped creature deals combat damage to a player, you create a 2/2 green Wolf creature token and that player mills ten cards.
Equip

Flying
Metalcraft — Whenever Screeching Silcaw deals combat damage to a player, if you control three or more artifacts, that player mills four cards.

: Put a charge counter on Grindclock.
: Target player mills X cards, where X is the number of charge counters on Grindclock.

Equipped creature gets +2/+2 and has protection from green and from blue.
Whenever equipped creature deals combat damage to a player, you create a 2/2 green Wolf creature token and that player mills ten cards.
Equip

Target player mills half their library, rounded down.

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

Target player mills five cards.

+2: Each player draws a card.
−1: Target player draws a card.
−10: Target player mills twenty cards.

Flying
Whenever another creature leaves the battlefield, you may have target player mill two cards.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

, : Target player mills X cards, where X is the number of cards in that player’s graveyard.

Whenever Halimar Excavator or another Ally enters the battlefield under your control, target player mills X cards, where X is the number of Allies you control.

Landfall — Whenever a land enters the battlefield under your control, target player mills three cards.

If an opponent searched their library this turn, you may pay rather than pay this spell’s mana cost.
Target opponent mills thirteen cards.

At the beginning of your upkeep, mill ten cards.
Whenever you roll , target player mills ten cards.

+2: Each player draws a card.
−1: Target player draws a card.
−10: Target player mills twenty cards.

Target player mills five cards.

Target player mills half their library, rounded down.

, : Create a 1/1 blue and black Zombie Wizard creature token.
: Target player loses X life and mills X cards, where X is the number of Zombies you control.

Whenever Nemesis of Reason attacks, defending player mills ten cards.

Flying
Whenever Stinkweed Imp deals combat damage to a creature, destroy that creature.
Dredge 5 (If you would draw a card, you may mill five cards instead. If you do, return this card from your graveyard to your hand.)

Flying
Whenever another creature leaves the battlefield, you may have target player mill two cards.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

+2: Each player draws a card.
−1: Target player draws a card.
−10: Target player mills twenty cards.

+2: Each player draws a card.
−1: Target player draws a card.
−10: Target player mills twenty cards.

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