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Jack Spero is a well known Algicosathlon creator,he is one of the most famous Algicosathlon creators along with Carykh,John Dubuc and Erikfassett.

His Algicosathlon is infamous for Day 1 which started the "Magenta Curse",something which would become very popular among the algicosathlon/marble race community. He has also made several other projects such as Marble Races. He recieved a lot of backlash when Black won his Algicosathlon instead of Cyan.