When Burning-Tree Emissary enters the battlefield, add {R}{G}.

Haste {T}, Sacrifice Fanatical Firebrand: It deals 1 damage to any target.

Whenever another red creature enters the battlefield under your control, Foundry Street Denizen gets +1/+0 until end of turn.

Kicker {R} (You may pay an additional {R} as you cast this spell.) When Goblin Bushwhacker enters the battlefield, if it was kicked, creatures you control get +1/+0 and gain haste until end of turn.

Whenever Goblin Heelcutter attacks, target creature can't block this turn. Dash {2}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

When Goblin Instigator enters the battlefield, create a 1/1 red Goblin creature token.

When Horned Kavu enters the battlefield, return a red or green creature you control to its owner's hand.

Kird Ape gets +1/+2 as long as you control a Forest.

({T}: Add {R} or {G}.) Highland Forest enters the battlefield tapped.

({T}: Add {R}.)

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

Choose target artifact or enchantment. Its owner shuffles it into their library.

Electrickery deals 1 damage to target creature you don't control. Overload {1}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

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

{X}{X}{1}: Destroy target noncreature artifact with mana value X.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.) Creatures you control get +1/+0 until end of turn.

When Voldaren Epicure enters the battlefield, it deals 1 damage to each opponent. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")