Angor never planned to get involved in any matter related to a Leviathan and get himself killed against the wizard-level monster, no matter how much fortune was waiting for him.
After returning to Erwin's house, he forgot everything about Roman and the Leviathan and continued learning Empty Ballad. With the help of his tablet, he successfully mastered ten runes for building the magic array under a week, which left him five more to go.
One day, Erwin came back from the association's office and came to him.
"Mister Padt, I've collected all the files I can find. But this is not the headquarters where they keep EVERYTHING recorded. The oldest timestamp was 2,000 years ago," Erwin said as he dropped a large bag as big as his body onto the floor.