Subterranean Scout

When Subterranean Scout enters, target creature with power 2 or less can't be blocked this turn.

Man-o'-War

When Man-o'-War enters, return target creature to its owner's hand.

Goblin Turncoat

Sacrifice a Goblin: Regenerate Goblin Turncoat.

Fire

Fire deals 2 damage divided as you choose among one or two targets.

Fire // Ice

Mountain

Chain Lightning

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.

Goblin Matron

When Goblin Matron enters, you may search your library for a Goblin card, reveal that card, put it into your hand, then shuffle.

Ovinize

Until end of turn, target creature loses all abilities and has base power and toughness 0/1.

Impulse

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Pashalik Mons

Whenever Pashalik Mons or another Goblin you control dies, Pashalik Mons deals 1 damage to any target.
{3}{R}, Sacrifice a Goblin: Create two 1/1 red Goblin creature tokens.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Swamp

Urborg Syphon-Mage

{2}{B}, {T}, Discard a card: Each other player loses 2 life. You gain life equal to the life lost this way.

Island

Nightscape Familiar

Blue spells and red spells you cast cost {1} less to cast.
{1}{B}: Regenerate Nightscape Familiar.

Recoil

Return target permanent to its owner's hand. Then that player discards a card.

Circular Logic

Counter target spell unless its controller pays {1} for each card in your graveyard.
Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Festering Goblin

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

Dralnu's Crusade

All Goblins get +1/+1.
All Goblins are black and are Zombies in addition to their other creature types.

Empty the Warrens

Create two 1/1 red Goblin creature tokens.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)