Goblin Motivator

{T}: Target creature gains haste until end of turn. (It can attack and {T} this turn.)

Fire Diamond

Fire Diamond enters tapped.
{T}: Add {R}.

Shock

Goblin Chariot

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

Plundering Predator

Flying
When Plundering Predator enters, you may discard a card. If you do, draw a card.

Feral Maaka

Mountain

Crash Through

Creatures you control gain trample until end of turn. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)
Draw a card.

Goblin Assailant

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Thrill of Possibility

As an additional cost to cast this spell, discard a card.
Draw two cards.