So here's my Lego Bionicle Krana display! : r/bioniclelego
Rarity level 8/10❗️Authentic LEGO Bionicle exclusive White metal Krana Kal promo piece, also called WMKK. They're almost impossible to find these days and only 5000 have been produced + around 100 spares! :
Bionicle Krana Mask Su : Part 42042Su | BrickLink
LEGO Bionicle Mata Nui Bohrok of Stone 8560: Pahrak (complete with Krana) 673419015561 | eBay
Bionicle Krana Mask Xa : Part 42042Xa | BrickLink
Bionicle: Bohrok, Bohrok-Va, and the Krana by DWestmoore on DeviantArt