Shoal Serpent

Defender
Landfall — Whenever a land enters the battlefield under your control, Shoal Serpent loses defender until end of turn.

Ball Lightning

Trample (This creature can deal excess combat damage to the player or planeswalker it’s attacking.)
Haste (This creature can attack and as soon as it comes under your control.)
At the beginning of the end step, sacrifice Ball Lightning.

Ant Queen

: Create a 1/1 green Insect creature token.

Mycoid Shepherd

Whenever Mycoid Shepherd or another creature you control with power 5 or greater dies, you may gain 5 life.

Grixis Grimblade

As long as you control another multicolored permanent, Grixis Grimblade gets +1/+1 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy that creature.)

Morbid Bloom

Exile target creature card from a graveyard, then create X 1/1 green Saproling creature tokens, where X is the exiled card’s toughness.

Drastic Revelation

Discard your hand. Draw seven cards, then discard three cards at random.

Drag Down

Domain — Target creature gets -1/-1 until end of turn for each basic land type among lands you control.

Gluttonous Slime

Flash
Devour 1 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with that many +1/+1 counters on it.)

Scavenger Drake

Flying
Whenever another creature dies, you may put a +1/+1 counter on Scavenger Drake.

Necrogenesis

: Exile target creature card from a graveyard. Create a 1/1 green Saproling creature token.

Bloodpyre Elemental

Sacrifice Bloodpyre Elemental: It deals 4 damage to target creature. Activate this ability only any time you could cast a sorcery.

Savage Hunger

Enchant creature
Enchanted creature gets +1/+0 and has trample.
Cycling (, Discard this card: Draw a card.)

Volcanic Submersion

Destroy target artifact or land.
Cycling (, Discard this card: Draw a card.)