Enchant creature card in a graveyard
When Animate Dead enters the battlefield, if it's on the battlefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battlefield with Animate Dead." Return enchanted creature card to the battlefield under your control and attach Animate Dead to it. When Animate Dead leaves the battlefield, that creature's controller sacrifices it.
Enchanted creature gets -1/-0.

If there are ten or more creature cards total in all graveyards, this spell costs less to cast.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
: Destroy target creature. It can't be regenerated.

Flying
Creatures can't attack you.

Search your library for up to three creature cards, put them into your graveyard, then shuffle your library.

Choose a nonland card name. Target player reveals their hand and discards all cards with that name.
Flashback—Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying
Whenever Crosis, the Purger deals combat damage to a player, you may pay . If you do, choose a color, then that player reveals their hand and discards all cards of that color.

: Add .
, Sacrifice Crystal Vein: Add .

When Diabolic Servitude enters the battlefield, return target creature card from your graveyard to the battlefield.
When the creature put onto the battlefield with Diabolic Servitude dies, exile it and return Diabolic Servitude to its owner's hand.
When Diabolic Servitude leaves the battlefield, exile the creature put onto the battlefield with Diabolic Servitude.

Return target creature card from your graveyard to the battlefield.
Flashback—Sacrifice three creatures. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Ebon Stronghold enters the battlefield tapped.
: Add .
, Sacrifice Ebon Stronghold: Add .

Search your library for a card and put that card into your graveyard. Then shuffle your library.

Each player puts a creature card from their graveyard onto the battlefield.

When Faceless Butcher enters the battlefield, exile target creature other than Faceless Butcher.
When Faceless Butcher leaves the battlefield, return the exiled card to the battlefield under its owner's control.

When Hidden Horror enters the battlefield, sacrifice it unless you discard a creature card.

Trample
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Shroud (This creature can't be the target of spells or abilities.)

Discard any number of cards. Target player reveals their hand, then you choose a nonland card from it for each card discarded this way. That player discards those cards.

Polluted Mire enters the battlefield tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

Discard a card: Putrid Imp gains flying until end of turn.
Threshold — As long as seven or more cards are in your graveyard, Putrid Imp gets +1/+1 and can't block.

Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to its converted mana cost.