There's a question about the hero Nicholas. The specialization description states a 2% discount per level, but in reality, it's much lower, at 1% + 1% for every 3 levels, judging by the test and the following snippet:

					
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This bug exists even in the clean version of the game. Also, on a map created in the map editor, there's no guard stationed near the stairs, which allows free passage to the adjacent zone. I don't know if this is the case on other maps, but it exists in random maps, and it significantly affects the gameplay. I don't remember why this was done, but a different solution needs to be found.