Tar Snare

Target creature gets -3/-2 until end of turn.

Infest

All creatures get -2/-2 until end of turn.

Arachnus Web

Enchant creature
Enchanted creature can’t attack or block, and its activated abilities can’t be activated.
At the beginning of the end step, if enchanted creature’s power is 4 or greater, destroy Arachnus Web.

Goblin Warchief

Goblin spells you cast cost less to cast.
Goblins you control have haste.

Rakdos Drake

Flying
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can’t block as long as it has a +1/+1 counter on it.)

Krenko, Mob Boss

: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Voracious Null

, Sacrifice another creature: Put two +1/+1 counters on Voracious Null. Activate this ability only any time you could cast a sorcery.

Krenko’s Enforcer

Intimidate (This creature can’t be blocked except by artifact creatures and/or creatures that share a color with it.)

Acidic Slime

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Acidic Slime enters the battlefield, destroy target artifact, enchantment, or land.

Reckless Spite

Destroy two target nonblack creatures. You lose 5 life.

Calculated Dismissal

Counter target spell unless its controller pays .
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Tezzeret’s Gambit

( can be paid with either or 2 life.)
Draw two cards, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Faithless Looting

Draw two cards, then discard two cards.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Gruesome Scourger

When Gruesome Scourger enters the battlefield, it deals damage to target opponent or planeswalker equal to the number of creatures you control.

Corpse Knight

Whenever another creature enters the battlefield under your control, each opponent loses 1 life.

Vengeful Warchief

Whenever you lose life for the first time each turn, put a +1/+1 counter on Vengeful Warchief. (Damage causes loss of life.)

Corpse Knight

Whenever another creature enters the battlefield under your control, each opponent loses 1 life.

Rabid Bite

Target creature you control deals damage equal to its power to target creature you don’t control.

Corpse Knight

Whenever another creature enters the battlefield under your control, each opponent loses 1 life.

Sorin’s Thirst

Sorin’s Thirst deals 2 damage to target creature and you gain 2 life.

Glen Elendra Archmage

Flying
, Sacrifice Glen Elendra Archmage: Counter target noncreature spell.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner’s control with a -1/-1 counter on it.)

Wild Hunger

Target creature gets +3/+1 and gains trample until end of turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Magmaw

, Sacrifice a nonland permanent: Magmaw deals 1 damage to any target.