Search for the Vault of Memory

The search wasn't easy. If you could use your divine power, you would found it in seconds. Fortunately, you still had the thinking speed of a god. After several days of researching, you successfully located the Vault of Memory: in a secret library under Ravenclaw Tower.

The way to open the vault was to re-arrange the books on the shells. The moment it opened, a strange light flashed. You felt like being hit by a curse, but since you're a god it had no effect.

You turned back and saw Clarisse and Hesper fall into an empty state: it's like a come with eyes opened. You quickly figure out that's the defensive mechanism of the vault: erasing the memories of anyone opened it. It's not that the Vault of Memory hasn't been found before, but no one remembered founding it before.

You stepped into the vault and found that not only you could use its power, but you could also use your divine power. Whatever the **** that restricted you before was, the vault has shielded you from it.