The doctor is in...

Arcane: Skull
Base Rarity: Legendary
Troop Type: Human
Troop Role: Mage
Troop Id: K19_13 / 6478
Max skills: 18    27    18    8
Kingdom: Darkstone
Kingdom Id: 3022
Trait #1: Greedy
Gain 2 bonus Gold on 4 or 5 Gem matches.
Trait #2: Impervious
Immune to all Status Effects, Devour, and Mana Burn.
Trait #3: Experiment
Inflict a random status effect on 4 or 5 Gem matches.
Spell: Plague Flask
Description: Deal [Magic + 1] damage to all enemies, boosted by Diseased and Poisoned enemies. Then Disease and Poison all enemies. [2x]
Mana Color: Purple, Brown
Mana Cost: 16
Spell Id: 7665