The RBC is a modern responsive yo-yo collaboration between MK1 and Spinworthy Yoyos. It is an aluminum re-imagining of Spinworthy’s wooden Blood Cell.
There were two releases. The original December 20th, 2021 release and a August 19th, 2022 release.
YoyoExpert Colorways
There were two exclusive RBC colorways sold by Yoyo Expert.
2nd Run Colorways
The 2nd run of the RBC was done in red, black, and clear. The black version was an official Unknown release that had hidden engravings on the yo-yo
