Comet Crawler

Lifelink
Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, this creature gets +2/+0 until end of turn.

Llanowar Elves

Swamp

Reassembling Skeleton

{1}{B}: Return this card from your graveyard to the battlefield tapped.

Forsaken Miner

This creature can't block.
Whenever you commit a crime, you may pay {B}. If you do, return this card from your graveyard to the battlefield. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Elegy Acolyte

Lifelink
Whenever one or more creatures you control deal combat damage to a player, you draw a card and lose 1 life.
Void — At the beginning of your end step, if a nonland permanent left the battlefield this turn or a spell was warped this turn, create a 2/2 colorless Robot artifact creature token.

Forest

Timeline Culler

Haste
You may cast this card from your graveyard using its warp ability.
Warp—{B}, Pay 2 life. (You may cast this card from your hand or graveyard for its warp cost. If you do, exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.)

Vampire Gourmand

Whenever this creature attacks, you may sacrifice another creature. If you do, draw a card and this creature can't be blocked this turn.

Tragic Trajectory

Target creature gets -2/-2 until end of turn.
Void — That creature gets -10/-10 until end of turn instead if a nonland permanent left the battlefield this turn or a spell was warped this turn.

Lightless Evangel

Whenever you sacrifice another creature or artifact, put a +1/+1 counter on this creature.

Darkstar Augur

Offspring {B} (You may pay an additional {B} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
Flying
At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its mana value.

Witherbloom Charm

Choose one —
• You may sacrifice a permanent. If you do, draw two cards.
• You gain 5 life.
• Destroy target nonland permanent with mana value 2 or less.

Bebop & Rocksteady

Whenever Bebop & Rocksteady attack or block, sacrifice a permanent unless you discard a card.