Well, that's only at first glance...
because you understand that in the offline version, a Minotaur cannot be killed by any unit.
and a single Fairy can defeat any number of Dragons.
IMHO: the fourth game is not suitable for offline play. Online is a completely different story. ;)
Any magical unit can do it;
But about its unsuitability... there are many bugs, which means a lot of headaches for the organizers.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!