Thrall
No, he's never led a Horde.

Arcane: Death
Base Rarity: Common
Troop Type: Human
Troop Role: Generator
Troop Id: K19_00 / 6146
Max skills: 13    38    4    6
Kingdom: Darkstone
Kingdom Id: 3022
Trait #1: Human Bond
Allied Humans gain 2 Life.
Trait #2: Magic Heart
Gain 1 Life for each Purple ally.
Trait #3: Magic Link
Gain bonus Purple Mana from Purple Gem matches.
Spell: Suffering
Description: Destroy [Magic + 4] Gems. Take 2 damage. If there are 13 or more Red Gems, gain an extra turn.
Mana Color: Purple
Mana Cost: 6
Spell Id: 7260