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! :
LEGO Flat Dark Gold Bionicle Krana Mask Za | Brick Owl - LEGO Marketplace
Bionicle Krana Mask Xa, White Metal Krana-Kal, Part # 42042wmkk – Atlanta Brick Co
Krana | The BIONICLE Wiki | Fandom
LEGO Red Bionicle Krana Mask Vu | Brick Owl - LEGO Marketplace