Finished the map. Pretty nice.
Regarding how to finish the Possesion Dungeon:
Either Level 10 Vampire or you use the democorn you get in the yellow dungeon.
Kite around the Dungeon core. If you get low on health, press ESC to instantly leave the dungeon with your creature. You can then heal it and get right back in, the core regenerates pretty slow.
The core is in the room above the bottom right of the red dungeon.

Here is how my dungeon looked like on the minimap in the end
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2947893729

How do you pass possession challenge? Do you need to be able to defeat entire dungeon with single possessed creature?

Will try fix it soon.

Cannot you remove the stupid AI speech ??? Seriously it's boring an messes up with the inputs...

Getting attacked soon after starting is not really in the spirit of My Pet Dungeon. This would be better off being a scenario or something.

The map has just returned to the previous version

As I said, do the steps I have suggested.

Also try loading some other maps before and then try loading this one again.

Nothing helps type of error ''Object reference not set to an instance of an object''

If it give you an error upon loading ( Object of an Object ), restart steam and try again. As alternative, try to load map 2 or 3 times and it will eventually load. Worse case you will have to restart PC.

I cant open the map because of an error, this maper is bugged as hell ( i think i lost about 4h of edditing )

Another solution is avoid clicking Save when you work with map. Use Local Publish instead. You can still use Save & Quit. Only avoid using Save option in editor. Should you encounter your map having rendering problems, stop using Save, load it in editor, correct it and use Publish without clicking Save.

It's map rending error. Very common and very annoying.

Solution is constant manual correction. To reduce the possibility of this problem, restart steam after long session in WFTO editor.

AI should work fine now, thanks all for help but i find another problem sometimes map generating random block on random place ^^

That chat is the part of old pre 2.0 AI. Until you manually adjust AI, it will always pop up. MPD requires special tweaks when you include AI as it normally sets default unpatched AI which was using dialogue chat for taunts and communication. Patched AI doesn't do that.

I think i found a solution but its not what i want in 100% this chat still opening only if u kill AI ( something like ggwp human )

The action you need is called Set AI Difficulty. You can use something like On Start => Set AI Difficulty 3 times for each underlord. This will do the job and activate AI for other underlords.

I think I know the issue you have here.

What AI have you set? Try disabling AI chat in map's mutators. Alternative way is set all AI players in map's option from Locked AI to Open and then making a trigger on start where you set AI difficulty for Underlord 2, Underlord 3 and Underlord 4 to your desired settings and personalities ( there personality names are the names you see when you select AI in skirmish, like Gold-Digger, Steamroller, Ravager, Guardian. ) Do not use Random ( it will lag ), for standard aka Oberon, type in Default.

i dont sure u want see this but i used only this dialog scripts https://i.imgur.com/KFpkqXd.png

Post a screenshot of the trigger that is responsible for dialogue chat so we can see how it looks.

i tried some things but nothing help

Very likely it's generating the same message over and over because trigger and condition have retro-active values set, meaning once they become true, they always remain true. It's logic error which can be fixed with the help of simple switch.

If the issue is the AI using its default chat, there is an option to turn it off in scripting; I cannot remember where, I think it is under faction modifier.

If something is spamming then it's likely you've used wrong or retro-active trigger or conditions. Try changing that or compose different script.

here is problem bcs its not my script just AI spaming vituperation and name of this AI is ''unnamed'' ang got same color like player

Add disable script so it stops working once done. This way the message will pop only once.

nothing help to stop AI spamming this text should be options to permanently off this chat

Try using dialog chat again. Usually Dialogue Chat fades off on it's own after some time.

if anyone knows how to turn off dialog chat, let me know

this wave work only if you turn it on and i know about this text and think how fix it

Also despite the AI telling me (via chat) that "it's a great time for an attack" none ever happened.

Just finished it. There weren't any waves coming through the path shown in the picture above (was I supposed to trigger them manually?). A single assault happened via the gate / crypt to the north of my dungeon core while I was vanquishing the Empire fort in the middle of the map. After killing every enemy on the map nothing happened.

in pet dungeon but changle variant in left corner

how do I find this map--I do not see the name in My Pet Dungeon, or in Skirmish?

Based on thumbnail alone, this looks pretty good.