One thing someone on Twitter noticed, on othermenuscreens, cross is cancel and circle is confirm. The opposite is true both here and in the menu where you trade toys with 004 (except here, probably a mistake), implying that you are making a mistake by accepting his deal.
Lost Property TransplantationLevel 2: Able to attract certain enemiesLost Property 503Oozing Stuffed ToyLevel 1: Shoot black slimes from the hand.
Able to grab onto and climb certain walls.Increase transplantation levelLevel 3: Dramatically increases endurance
Dramatically increases insanity resistanceCancelIn exchange for consuming humanity, the abilities of lost properties can be used.