Festering Goblin

When this creature dies, target creature gets -1/-1 until end of turn.

Shattered Seraph

Flying
When this creature enters, you gain 3 life.
{2}, Exile this card from your hand: Target land gains "{T}: Add {W}, {U}, or {B}" until this card is cast from exile. You may cast this card for as long as it remains exiled.

Counterspell

Go for the Throat

Profane Insight

You draw a card and you lose 1 life. (Then exile this card. You may cast the creature later from exile.)

Foulmire Knight

Foulmire Knight // Profane Insight

Swamp

Nested Shambler

When this creature dies, create X tapped 1/1 green Squirrel creature tokens, where X is this creature's power.

Delraich

You may sacrifice three black creatures rather than pay this spell's mana cost.
Trample

Plains

Island

Demon of Death's Gate

You may pay 6 life and sacrifice three black creatures rather than pay this spell's mana cost.
Flying, trample

Angelic Benediction

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
Whenever a creature you control attacks alone, you may tap target creature.

Path to Exile

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Infestation Sage

When this creature dies, create a 1/1 black and green Insect creature token with flying.