Downhill Charge

You may sacrifice a Mountain rather than pay this spell's mana cost.
Target creature gets +X/+0 until end of turn, where X is the number of Mountains you control.

Surging Flame

Ripple 4 (When you cast this spell, you may reveal the top four cards of your library. You may cast spells with the same name as this spell from among those cards without paying their mana costs. Put the rest on the bottom of your library.)
Surging Flame deals 2 damage to any target.

Laccolith Titan

Whenever Laccolith Titan becomes blocked, you may have it deal damage equal to its power to target creature. If you do, Laccolith Titan assigns no combat damage this turn.

Crater Elemental

{R}, {T}, Sacrifice Crater Elemental: It deals 4 damage to target creature.
Formidable — {2}{R}: Crater Elemental has base power 8 until end of turn. Activate only if creatures you control have total power 8 or greater.

Falter

Creatures without flying can't block this turn.

Seal of Fire

Sacrifice Seal of Fire: It deals 2 damage to any target.

Laccolith Whelp

Whenever Laccolith Whelp becomes blocked, you may have it deal damage equal to its power to target creature. If you do, Laccolith Whelp assigns no combat damage this turn.

Bravado

Enchant creature
Enchanted creature gets +1/+1 for each other creature you control.

Butcher Orgg

You may assign Butcher Orgg's combat damage divided as you choose among defending player and/or any number of creatures they control.

Mountain

Form of the Dragon

At the beginning of your upkeep, Form of the Dragon deals 5 damage to any target.
At the beginning of each end step, your life total becomes 5.
Creatures without flying can't attack you.

Torch Fiend

{R}, Sacrifice Torch Fiend: Destroy target artifact.

Laccolith Grunt

Whenever Laccolith Grunt becomes blocked, you may have it deal damage equal to its power to target creature. If you do, Laccolith Grunt assigns no combat damage this turn.

Expedite

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

Laccolith Warrior

Whenever Laccolith Warrior becomes blocked, you may have it deal damage equal to its power to target creature. If you do, Laccolith Warrior assigns no combat damage this turn.