Cinder Elemental

, , Sacrifice Cinder Elemental: It deals X damage to any target.

Hindervines

Prevent all combat damage that would be dealt this turn by creatures with no +1/+1 counters on them.

Illusionist’s Bracers

Whenever an ability of equipped creature is activated, if it isn’t a mana ability, copy that ability. You may choose new targets for the copy.
Equip

Miming Slime

Create an X/X green Ooze creature token, where X is the greatest power among creatures you control.

The Mimeoplasm

As The Mimeoplasm enters, you may exile two creature cards from graveyards. If you do, it enters as a copy of one of those cards with a number of additional +1/+1 counters on it equal to the power of the other card.

Archon of the Triumvirate

Flying
Whenever Archon of the Triumvirate attacks, detain up to two target nonland permanents your opponents control. (Until your next turn, those permanents can’t attack or block and their activated abilities can’t be activated.)

Savage Surge

Target creature gets +2/+2 until end of turn. Untap that creature.

Jarad’s Orders

Search your library for up to two creature cards and reveal them. Put one into your hand and the other into your graveyard. Then shuffle.

Abrupt Decay

This spell can’t be countered.
Destroy target nonland permanent with mana value 3 or less.

Dreg Mangler

Haste
Scavenge (, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card’s power on target creature. Scavenge only as a sorcery.)

Assassin

Whenever this creature deals combat damage to a player, that player loses the game.

Jarad, Golgari Lich Lord

Jarad, Golgari Lich Lord gets +1/+1 for each creature card in your graveyard.
, Sacrifice another creature: Each opponent loses life equal to the sacrificed creature’s power.
Sacrifice a Swamp and a Forest: Return Jarad from your graveyard to your hand.

Niv-Mizzet, the Firemind

Flying
Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target.
: Draw a card.

Thundermaw Hellkite

Flying
Haste (This creature can attack and as soon as it comes under your control.)
When Thundermaw Hellkite enters, it deals 1 damage to each creature with flying your opponents control. Tap those creatures.

Talrand, Sky Summoner

Whenever you cast an instant or sorcery spell, create a 2/2 blue Drake creature token with flying.

Door to Nothingness

Door to Nothingness enters tapped.
, , Sacrifice Door to Nothingness: Target player loses the game.