Talk:Fusion/@comment-103.11.50.213-20140617015120/@comment-121.74.126.35-20140619214313

Serration R9 takes 4088 energy. A R10 takes 8184 energy. 8184-4088=4096. There is 31 energy in a R5 rare core. (4096÷31=132.1) So it will take you 133 R5 rares to get your rank 9 Serration to rank 10 or 132 rares and 1 common.