The day that Adonis was confirmed to be missing, they found a letter in his room.
The thing seemed to have been written in a hurry, and it was addressed to everyone—his classmates, the Royal Council, and all who cared to see.
It was:
~I am deeply sorry it has to be this way, and that it took me so long to see, but I finally realize my mistakes.
I thought I could help everyone, and save this world, but my calculations were wrong. I made so many errors, and those miscalculations cost us so many lives.
I can see those mistakes now… and I know I have to rectify them.
Don't bother searching for me. You won't be able to find me. I now recognize that for me to truly save everyone—even those who have fallen—I need far more strength than I currently possess.
A journey beckons to me. It will be fraught with danger, but I shall overcome. I shall survive and return once again; a much more experienced and capable Hero.