If a Weapon is able to consume the souls of precisely ninety-nine corrupted souls and one Witch's soul, the Weapon will gain great power, becoming a full-fledged Death Scythe.

It's the assignment of every student at the academy, but making even a single mistake will result in the forfeiture of all souls collected.

[The grim reaper's shoulders slump, and he presses a palm into his face, sighing.]

In fact, I lost all the souls I had collected for the Thompson sisters once, when I recklessly destroyed the Pyramid of Anubis. Such unspeakable beauty... even recalling that dreadful wreckage is depressing.