Goblin Bushwhacker

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

Foundry Street Denizen

Whenever another red creature you control enters, this creature gets +1/+0 until end of turn.

Goblin General

Whenever this creature attacks, Goblin creatures you control get +1/+1 until end of turn.

Goblin Tomb Raider

As long as you control an artifact, this creature gets +1/+0 and has haste.

Goblin Trailblazer

Menace (This creature can't be blocked except by two or more creatures.)

Sparksmith

{T}: This creature deals X damage to target creature and X damage to you, where X is the number of Goblins on the battlefield.

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.

Mogg Raider

Sacrifice a Goblin: Target creature gets +1/+1 until end of turn.

Tarfire

Goblin Champion

Haste
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Mudbrawler Cohort

Haste
This creature gets +1/+1 as long as you control another red creature.

Intimidator Initiate

Whenever a player casts a red spell, you may pay {1}. If you do, target creature can't block this turn.

Goblin Sledder

Frenzied Goblin

Whenever this creature attacks, you may pay {R}. If you do, target creature can't block this turn.

Goblin Grappler

Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)