The risks far outweigh the benefits.
Keep in mind that while the key was shared publicly, using it to create custom figurines may infringe on Nintendo's intellectual property rights. amiibo retail encryption key pastebin
Because these keys are sensitive, direct links often expire or are removed. You can typically find a "live" version by searching for these specific Pastebin or Archive identifiers: The risks far outweigh the benefits
The key_retail.bin file actually contains two distinct keys needed for different parts of the Amiibo data structure: each 80 bytes long:
The key_retail.bin file typically consists of two distinct master keys, each 80 bytes long: