Go to EJT wiki and look at the next difficulty chart if you want remix this [UNTIL CLASS -2 ENDING WE USE CUSTOM DIFFICULTIES] https://jtohs-joke-towers.fandom.com/wiki/Eternal_Joke_Towers_(EJT)_Wiki
The symbol is for the fictional number Heta. Next one’s rating is -Sunda[10] then the ones after that follow [Reverse] [Normal] [Negative] Fictional Googology.