7th Interportal Tournament of HMM3-OFF: "Earth Magic"

Let's figure out the Flight issue! Heroes don't have Wisdom, and they can't learn it: it's disabled in the map properties, and all heroes with Wisdom are prohibited. If I attack the Pyramid with a hero who has Thunderclap (yes, the spellbook appears with the hero and remains even after he removes it), the game displays the appropriate message after killing the golems (see screenshot). Moreover, I am also denied access to it in the Sanctuary of Magical Thought in the south, near the lighthouse.
At the same time, a scroll with the spell adds it to the spellbook.
Therefore, I insist on getting a clear answer: Has anyone who completed the map been able to obtain Flight? If so, how?