Its health, like any other Dungeon Mobs, scale on which floor they spawn in.
It can also have modifiers such as Healthy, Flaming, Stormy, Speedy or Fortified. Healthy increases the mob's ❤ Health. Fortified increases the mob's ❈ Defense. Flaming makes melee attacks light the player on fire. Speedy makes the mob move much faster. Stormy makes the mob strike lightning on nearby players, dealing true damage.