Auto-translated
Today, on level 3 of the Road Home campaign, I was surprised that 3 black dragons and 3 red dragons + 5 hydras + 44 water elementals couldn't take a castle defended by approximately 34 hydras, 55 griffins, and a few other units, including 17 centaurs. I acquired the 3 black dragons in a somewhat unfair way, but since I'm mostly interested in the story, I often add dragons because it's only possible to complete the first missions fairly, but I don't add too many dragons... :) My mistake was that the knight had little magic, and if I waited for a more powerful mage, there would be even more hydras. The computer constantly casts Curse on the elementals, Steel Skin and Bloodlust on the hydras, and, moreover, the hydra attacks everyone around it. Even blinding it initially and dealing with all the other units didn't help; I still lost to the hydra with almost my entire army. :)