Winged Bison
You will believe a cow can fly.

Arcane: Light
Base Rarity: Ultra-Rare
Troop Type: Beast
Troop Role: Generator
Troop Id: K18_06 / 6242
Max skills: 15    37    6    14
Kingdom: Wild Plains
Kingdom Id: 3027
Trait #1: Thick Head
Immunity to Stun.
Trait #2: Thick Hide
Reduce damage from Skulls by 20%.
Trait #3: Nature Link
Gain bonus Green Mana from Green Gem matches.
Spell: Migrate
Description: Transform all Purple Gems to Red. 40% chance to summon a Winged Bison, boosted by Gems transformed. [2x]
Mana Color: Green, Yellow
Mana Cost: 11
Spell Id: 7385