When Boggart Harbinger enters the battlefield, you may search your library for a Goblin card, reveal it, then shuffle and put that card on top.

Champion a Goblin (When this enters the battlefield, sacrifice it unless you exile another Goblin you control. When this leaves the battlefield, that card returns to the battlefield.)

Whenever a Goblin you control deals combat damage to a player, you may create a 1/1 black Goblin Rogue creature token.

Whenever another Goblin you control is put into a graveyard from the battlefield, you may have Boggart Shenanigans deal 1 damage to target player or planeswalker.

Indestructible

Whenever Brash Taunter is dealt damage, it deals that much damage to target opponent.

{2}{R}, {T}: Brash Taunter fights another target creature.

As an additional cost to cast this spell, sacrifice an artifact or creature.

Draw two cards.

Haste (This creature can attack and {T} as soon as it comes under your control.)

Other Goblin creatures you control get +1/+1 and have haste.

Other Goblins you control get +1/+1.

Sacrifice a Goblin: Destroy target artifact.

Goblin spells you cast cost {1} less to cast.

Goblins you control have haste.

Whenever Krenko, Tin Street Kingpin attacks, put a +1/+1 counter on it, then create a number of 1/1 red Goblin creature tokens equal to Krenko's power.

Other Goblin creatures you control get +1/+1.

{T}: Regenerate another target Goblin.

Flash

When Munitions Expert enters the battlefield, you may have it deal damage to target creature or planeswalker equal to the number of Goblins you control.

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.

At the beginning of your upkeep, each opponent may create a Treasure token. For each opponent who does, you create a Treasure token.

Whenever an opponent taps an artifact for mana, gain control of that artifact until the end of your next turn.

Each opponent sacrifices an artifact. For each artifact sacrificed this way, you create a Treasure token.

Flashback {8}{R}{R}. This spell costs {X} less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying

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.)

When Voracious Dragon enters the battlefield, it deals damage to any target equal to twice the number of Goblins it devoured.

Target player sacrifices a creature. If a Goblin is sacrificed this way, that player creates two 1/1 black Goblin Rogue creature tokens, and those tokens gain haste until end of turn.