Keyword: Mill

Enchant creature
Enchanted creature gets +3/+3.
Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.)

Return up to three target land cards from your graveyard to your hand.
Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

When Deadbridge Chant enters the battlefield, mill ten cards.
At the beginning of your upkeep, choose a card at random in your graveyard. If it’s a creature card, put it onto the battlefield. Otherwise, put it into your hand.

Rot Farm Skeleton can’t block.
, Mill four cards: Return Rot Farm Skeleton from your graveyard to the battlefield. Activate this ability only any time you could cast a sorcery.

Choose target creature. Mill four cards, then that creature gets -1/-1 until end of turn for each land card in your graveyard.

Target player mills two cards. Draw two cards.

: Whenever a card is put into an opponent’s graveyard from anywhere this turn, that player loses 1 life.
: Target player mills two cards.

Target player mills three cards.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Flying
When Mindeye Drake dies, target player mills five cards.

Target player mills four cards. You draw a card for each creature card put into their graveyard this way.

Counter target spell. Its controller mills two cards.

Whenever another blue creature enters the battlefield under your control, target player mills two cards.

Shuffle all cards from your graveyard into your library. Target player mills that many cards.

Defender
, : Target player mills X cards, where X is the number of creatures with defender you control.

Whenever Crosstown Courier deals combat damage to a player, that player mills that many cards.

: Target player mills a card. (They put the top card of their library into their graveyard.)
, , Sacrifice Codex Shredder: Return target card from your graveyard to your hand.

Enchant land
Whenever enchanted land becomes tapped, its controller mills three cards.

Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

Dakmor Salvage enters the battlefield tapped.
: Add .
Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.)

Golgari Grave-Troll enters the battlefield with a +1/+1 counter on it for each creature card in your graveyard.
, Remove a +1/+1 counter from Golgari Grave-Troll: Regenerate Golgari Grave-Troll.
Dredge 6 (If you would draw a card, you may mill six cards instead. If you do, return this card from your graveyard to your hand.)

Return up to three target land cards from your graveyard to your hand.
Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

Target player reveals their hand. You choose a card from it. That player discards that card.
Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.)

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.)

Sacrifice Shambling Shell: Put a +1/+1 counter on target creature.
Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)