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How I proceed:
1. I go to the castle. I capture it. A cutscene sends me to the bridge.
2. I go to the bridge. I am sent to the prophet.
3. The prophet sends me to get boots in the crypt.
4. I go to the dungeon (there is no crypt in either the left or the right one).
Thanks, Alan, I'll try searching the graveyard today.
Ah, but the crypt must be somewhere, right?