Xaart, greetings!
Thank you for the feedback and the link. I occasionally visit that Polish website. I hadn't mentioned this map before, and it wasn't in my collection, but I've downloaded it now. I read your report and the translation of the discussion, and it immediately became clear why everything seems so familiar: well, yes, the map author is BARTER, the creator of "Zemsta Mutare," and, as DDoS wrote there, "Zemsta Mutare" is a continuation of this story. This immediately raises concerns about an extremely long game (well, the author loves legions of monsters!) and whether it's beatable, either due to player errors or author errors. By the way, a video recently appeared: "Vampire Lords vs. Azure Dragons", featuring a battle from another map by BARTER: "Legiony Potworów". The title translates to "Legions of Monsters." The game lasts for 28 months!
In general, several maps by this author are available on Maps4Heroes; you can find them like this: here, by searching for their nickname.
And, to avoid problems with completing quests on RPG maps, use the invaluable utility ProspectorRT. I always take screenshots of the list of quests from seers and guardians right away. Then, from the very beginning, it's clear which artifacts or monsters are critical for completing the game and which enemy heroes need to be defeated, rather than simply letting them disappear. Of course, the texts may also contain valuable information.
Besides the Blade, protection against Armageddon is provided by troops with immunity to fire or level 4 magic: the same black dragons, ifrits, etc.
If you reach the end of the map, let us know. Good luck!
Marmot, thank you!
It's easier with Prospector, but I always remember it after starting the game. I reached the end of the map; there were no errors or bugs. All that's left is to take the Castle and win. If I can)))