Orcish Oriflamme

Attacking creatures you control get +1/+0.

Stone Giant

{T}: Target creature you control with toughness less than Stone Giant's power gains flying until end of turn. Destroy that creature at the beginning of the next end step.

Earthbind

Enchant creature
When Earthbind enters, if enchanted creature has flying, Earthbind deals 2 damage to that creature and Earthbind gains "Enchanted creature loses flying."

Hurloon Minotaur

Uthden Troll

Goblin King

Other Goblins get +1/+1 and have mountainwalk.

Mountain

Firebreathing

Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.

Gauntlet of Might

Red creatures get +1/+1.
Whenever a Mountain is tapped for mana, its controller adds an additional {R}.

Goblin Balloon Brigade

{R}: Goblin Balloon Brigade gains flying until end of turn.

Orcish Artillery

{T}: Orcish Artillery deals 2 damage to any target and 3 damage to you.