The Quest for Truth

As I understand it, there's no way to put text into a spoiler here, so I'm writing with spoilers.

So, I've finished this campaign. The last 2 missions—Sandro and the vampire—really stood out. All I can say is it feels like they squeezed everything out of Heroes 5 and made a proper campaign without the fluff, tedious gameplay, or a dragged-out plot. Minimalist but truly beautiful locations, especially those "heavens" like in Heroes 6, and the storyline about the coolest character in the series—Sandro—is almost the biggest plus for me. I haven't played many full campaigns, and until now I considered MasteR's campaigns the best, but now there's a new favorite. I played all day from the morning; I was just emotionally exhausted, it turned out so awesome. In my opinion, Sandro deserves such stories; after all, he's the only one who saw the essence of things, and it's such a shame that he was written out of the plot without any explanation at all. Fortunately, campaigns like this shed light on things, albeit through the prism of the author's understanding. The only things I didn't understand were three things: what was that little book in the last mission "Part 1: 81", why did Mythograd have a special veil if Sandro is going to die in the plot anyway, and what mage saved the paladin at the end. Especially about the mage, because it looked quite funny and like a cliché. I can't find fault with anything else, I liked everything, definitely 10 out of 10; Heroes is worth playing just to download this campaign and complete it.

Added after 1 minute

No additional quest appeared for me. But once all the bugs and AI behavior are fixed, I'll be happy to replay it.

(But I would nerf the ghosts in mission 5, it's quite a pain to kill them while preserving the entire army; you already want the boss and the ending, but you're running around the islands and spending half an hour trying to kill them)

Added after 2 minutes
And I'll add one more thing. In the "secret mission" as the vampire, the Shantiri Crystal is very OP. If you place skeleton archers in the corner and put the crystal diagonally in front of them, most 2x2 units don't attack the crystal and just freeze. Only thanks to this was I able to pass the mission without much trouble; in my opinion, it's the hardest mission in the whole campaign...

Added after 4 minutes
Damn, and I'll add one very last thing. If the campaign is too hard for you—go through blinding vampires, darkness, mass haste in the attack tree, and use dark energy to recruit only vampires. 300-400 of them can destroy legions solo. I played with the hero and encountered no difficulties except for the very beginning of the missions.

Added after 9 minutes

There was no battle with the demon. I entered the underground after I had already defeated everyone I could, except for the last orc Castle. I really liked the "eclipse" color filter. There's a mage there, I smacked him, and went to the portal; nothing happened, the quest was counted, no audio track started, and certainly no movie. So I thought that's how it's supposed to be, since the "red" light filter turned off.

Well... phew... finished the campaign. To say I enjoyed it would be an understatement (two days on the couch with beer just vanished from my life). Damn, I haven't played anything like this in a long time... if not for the voice acting, I'd call it a masterpiece. A year and a half was clearly not spent in vain—this work will take its place in the collection of true connoisseurs of the game.
Finished it without the author's edits/patch.
Regarding the edits: I used the Wall of Swords only once during the game (on fire elementals (as I remember—3 stacks crawled out)—and the summon was available to the entire team without exception.
Other buffs etc. aren't that important except for Elrath's Incarnation—you messed up there (( (the thing is that by the time you reach him, years will pass and mountains of your troops' corpses will pile up )) I fought him with an army on its last legs.
About the game: I didn't understand who the two bums hanging out in front of the garrison to Elrath in the last mission were (Mirael with one inquisitor and Vantash with random units from 6 and dragons)!? I wiped them out without looking and moved on... there were no movies/conversations. Also didn't understand the riddle with the numbers (screenshot). In the easter egg, it would be desirable to add either a mine or a garrison... the fort on the hill is at the very end before the finale, and the troops are a complete mishmash (falls to the dark side)... didn't know who to dismiss and who would be encountered further along the way. So all skeleton shooters, liches, and zombies were dismissed (( pure random. I was worried about Saahir (thought he would be involved somehow later ).

P.S. essentially we got a Very decent campaign with 6 (six) missions.
The main thing in the game turned out not to be darkness (hardly used control—mark, dispel, slow), but the summon carried the whole game—phantoms are everything here.
Thanks for the game!