REQUIREMENT :

-MAKE SURE U HAVE TUNE AND UPGRADE ECHO MANY 

-IF U DONT HAVE TUNE AND UPGRADE ECHO DONT WORRY IT CAN BE FARM FROM TACET EVERY DAY AFTER RESET AND FROM WORLD TOO

-EVERY ECHO WILL DOUBLE CRIT 

-MAKE SURE U HAVE 1 TEAM WELL BUILD TO FARM ECHO FROM WORLD