Brushwagg

Whenever this creature blocks or becomes blocked, it gets -2/+2 until end of turn.

Atogatog

Sacrifice an Atog creature: Atogatog gets +X/+X until end of turn, where X is the sacrificed creature's power.

Ragamuffyn

Hellbent — {T}, Sacrifice a creature or land: Draw a card. Activate only if you have no cards in hand.

Thrashing Wumpus

{B}: This creature deals 1 damage to each creature and each player.

Turn to Frog

Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Sickle Ripper

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Boot Nipper

This creature enters with your choice of a deathtouch counter or a lifelink counter on it.

Scuttlemutt

{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.

Flumph

Defender, flying
Whenever this creature is dealt damage, you and target opponent each draw a card.

Air Bladder

Enchant creature
Enchanted creature has flying.
Enchanted creature can block only creatures with flying.

Grollub

Whenever this creature is dealt damage, each opponent gains that much life.

Rag Man

{B}{B}{B}, {T}: Target opponent reveals their hand and discards a creature card at random. Activate only during your turn.

Sizzle

Twiddle

You may tap or untap target artifact, creature, or land.

Mad Auntie

Other Goblin creatures you control get +1/+1.
{T}: Regenerate another target Goblin.

Chill

Noggin Whack

Prowl {1}{B} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)
Target player reveals three cards from their hand. You choose two of them. That player discards those cards.