Journey

During Konstantin's campaign, I reached the mausoleum. I completed all quests except for the ones involving bears, the thief, the Tear of Ashera, and the astral gate (5th dwelling). I hit a dead end, never encountered the Law, and have no idea where to steal artifacts. I've explored all available dungeons and castles, but I can only clear the Temple of the Elements with the hero carrying the yellow tent. On the surface, I've cleared everything. How do I access the part of the dungeon located near the starting castle? Where should I go, and what should I do?