Forget letting the dogs out... who let the Ogryn?

Arcane: Rage
Base Rarity: Common
Troop Type: Orc, Giant
Troop Role: Assassin
Troop Id: K17_08 / 6344
Max skills: 30    22    13    12
Kingdom: Grosh-Nak
Kingdom Id: 3018
Trait #1: Fire Heart
Gain 1 Life for each Red ally.
Trait #2: Fireproof
Immunity to Burning and Faerie Fire.
Trait #3: Fire Aura
All Red Allies gain 5 to all Stats.
Spell: Rampage
Description: Deal [Magic + 3] damage to an enemy. If there are 13 or more Red Gems, deal triple damage. Create a Firestorm.
Mana Color: Red
Mana Cost: 11
Spell Id: 7496