Talk:Overlord Volume 10/@comment-5480911-20160613153644/@comment-27033694-20160613181158

The Heaven's Feather allows players to switch their race to an angel. The Fallen Seeds allows players to switch their race to a devil. The Book of the Dead allows the player to advance his racial class into an Elder Lich.

The item within the box is probably the Heaven's Feather or the Fallen Seeds.