Basically, you need a Dungeon faction with a Mind Lord hero, Subjugation, and Dark Regeneration (essential, as he has unicorns). Logistics -> Sorcery, if the opponent definitely won't run away from you. Although you can keep Logistics and take "Sharp Mind" to cast the spell faster. Artifacts of Death, as mentioned above, are definitely not superfluous. And if you also have a Ring of Speed and Dragon Armor, it's even better. You can try it like this.
Basically, you need a Dungeon faction with a Mind Lord hero, Subjugation, and Dark Regeneration (essential, as he has unicorns). Logistics -> Sorcery, if the opponent definitely won't run away from you. Although you can keep Logistics and take "Sharp Mind" to cast the spell faster. Artifacts of Death, as mentioned above, are definitely not superfluous. And if you also have a Ring of Speed and Dragon Armor, it's even better. You can try it like this.