Must be a Doom Horror. My mistake.

I just tested the Vastness. He is more than capable of taking out 50-60 Hardened Troops. And still takes out all the Manifestations, Earth Attacks, he did die to a Pale Riders though. But I think it was just the sheer number of lances and being undead.

I'd hope a Level 9 Spell would take him out before he can jump to another province.