Blox Fruits - Makuro No Key Now

This query could be referring to a few different things within the context of :

The or Hidden Key used for unlocking specific boss rooms or rare items. Blox Fruits - Makuro no key

A specific or script used for automated gameplay or "auto-farming" involving keys. This query could be referring to a few

The (sometimes called the "Macro Key" by players) used to unlock the Electric Claw fighting style. Blox Fruits - Makuro no key

Could you please clarify if you are looking for a on how to obtain a specific in-game item, or if you are looking for information regarding automated macros ?