Viashino Sandscout

Haste (This creature can attack and {T} as soon as it comes under your control.)
At the beginning of the end step, return Viashino Sandscout to its owner's hand. (Return it only if it's on the battlefield.)

Cathartic Reunion

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

Bloodrock Cyclops

Bloodrock Cyclops attacks each combat if able.

Demolish

Rock Badger

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Cone of Flame

Cone of Flame deals 1 damage to any target, 2 damage to another target, and 3 damage to a third target.

Lightning Elemental

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

Smash

Ruinous Gremlin

{2}{R}, Sacrifice Ruinous Gremlin: Destroy target artifact.

Mountain

Uncontrollable Anger

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature gets +2/+2 and attacks each combat if able.

Speedway Fanatic

Haste
Whenever Speedway Fanatic crews a Vehicle, that Vehicle gains haste until end of turn.