What do you think, who is stronger, the Ancient Horror or the Black Dragon?
Archangel or Black Dragon?

The Black Dragon is good, but I wouldn't bet on it.

The thing is, I was initially looking at the poll from the perspective of who is stronger in general, abstracting from the fact that this is a battle between heroes of level 1 only with these creatures in a quantity of 1, and then, of course, the dragon wins. 1 Black Dragon, given the presence of high-level magic, can defeat a certain number of horrors: in one stack (Berserk + Explosion, for example) or in several (Armageddon). Archangels are also vulnerable to Explosion or Armageddon, although it will be more difficult for the dragon to fight them due to their lower speed, but the battle can definitely take place in a dungeon with a speed amulet on the hero with the dragon. Well, that's my view. I just find it hard to imagine a game situation in which there would be a battle: 1 Black Dragon against 1 Titan or Archangel.