There aren't enough Tower of God fics out there so here are some challenges: #1: After the 2nd Floor Test ends Headon appears before Kun Aguero Agnis and gives him an offer he can't refuse: to go back to the past and save his best friend. But at what cost? #2: Rachel is sent to Lero-ro's district and Baam to Quant's. #3: Yuri never learns about the irregular [Baam] on the base floor. #4: The story of Zahard entering the Tower and establishing his empire. I have some ideas how I think the stories should work out but I intentionally left them open-ended.