chtch
Auto-translated
A similar situation... I cleared the map, collected the entire set of armor, freed Kalindra, found Shangri-La... in short, I did everything except "defeat Sheltem"... I'm standing here, banging my head against the gate - and I don't know where else to go. In general, there are still two unused underground entrances - but both are inaccessible - one is visible at a level below the dungeon (next to the entrance that leads to Shangri-La), and the other is on the surface, blocked by a large stone - maybe there's some trick to them and you need to find a way to get through them to open the gate? But how...