Mountain

Bitter Reunion

When Bitter Reunion enters, you may discard a card. If you do, draw two cards.
{1}, Sacrifice Bitter Reunion: Creatures you control gain haste until end of turn.

Messenger's Speed

Enchant creature
Enchanted creature has trample and haste.

Maximize Velocity

Target creature gets +1/+1 and gains haste until end of turn.
Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Onakke Javelineer

Reach
{T}: Onakke Javelineer deals 2 damage to target player or battle.

Rubblebelt Recluse

Rubblebelt Recluse attacks each combat if able.

Storm Caller

When Storm Caller enters, it deals 2 damage to each opponent.

Hoarding Ogre

Whenever Hoarding Ogre attacks, roll a d20.
1—9 | Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
10—19 | Create two Treasure tokens.
20 | Create three Treasure tokens.

Kick in the Door

Put a +1/+1 counter on target creature. That creature gains haste until end of turn and can't be blocked by Walls this turn. Venture into the dungeon. (Enter the first room or advance to the next room.)

Blood Ogre

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.)
First strike (This creature deals combat damage before creatures without first strike.)

Expedite

Target creature gains haste until end of turn.
Draw a card.

Reckless Brute

Haste (This creature can attack and {T} as soon as it comes under your control.)
Reckless Brute attacks each combat if able.