Goblin Sledder

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

Mudbutton Clanger

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Mudbutton Clanger, you may reveal it. If you do, Mudbutton Clanger gets +1/+1 until end of turn.

Reckless Lackey

First strike, haste
{2}{R}, Sacrifice Reckless Lackey: Draw a card and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Foundry Street Denizen

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

Goblin War Strike

Goblin War Strike deals damage to target player or planeswalker equal to the number of Goblins you control.

Frenzied Goblin

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

Goblin Blast-Runner

Goblin Blast-Runner gets +2/+0 and has menace as long as you sacrificed a permanent this turn.

Raging Goblin

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

Mountain

Smoldering Spires

Smoldering Spires enters tapped.
When Smoldering Spires enters, target creature can't block this turn.
{T}: Add {R}.

Mogg Conscripts

Mogg Conscripts can't attack unless you've cast a creature spell this turn.

Akki Avalanchers

Sacrifice a land: Akki Avalanchers gets +2/+0 until end of turn. Activate only once each turn.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

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.