WG. New Great War 33.

I downloaded both maps, but I only had time to play WW33. It's a great map, with a good level of difficulty. I have a problem. I got stuck at one point (I captured all the cities at the top and defeated all the enemies, and I captured 3 cities in the dungeon. But I can't do anything further, no matter where I go - there's a portal that leads to a light blue border guard, and on the other side, there's a pink and purple one. None of the castles I captured have spells like flight or a temporary portal. I even tried placing the Grail in the Conflux to make all magic available, but it didn't help). I can't think of anything else to do. Can you tell me where I went wrong?