Putrid Goblin

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.)

First Day of Class

Whenever a creature you control enters this turn, put a +1/+1 counter on it and it gains haste until end of turn.
Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Mayhem Devil

Whenever a player sacrifices a permanent, this creature deals 1 damage to any target.

Metallic Mimic

As this creature enters, choose a creature type.
This creature is the chosen type in addition to its other types.
Each other creature you control of the chosen type enters with an additional +1/+1 counter on it.

Skirk Prospector

Mountain

Goblin Bombardment

Sacrifice a creature: This enchantment deals 1 damage to any target.

Blood Artist

Whenever this creature or another creature dies, target player loses 1 life and you gain 1 life.

Boggart Cursecrafter

Deathtouch
Whenever another Goblin you control dies, this creature deals 1 damage to each opponent.

Goblin Matron

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

Elvish Pioneer

When this creature enters, you may put a basic land card from your hand onto the battlefield tapped.

Swamp

Murderous Redcap

When this creature enters, it deals damage equal to its power to any target.
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.)

Goblin Grenade

As an additional cost to cast this spell, sacrifice a Goblin.
Goblin Grenade deals 5 damage to any target.