Talk:Serration/@comment-98.89.19.53-20150609202415/@comment-26394741-20150617041941

From what I understand, it's because every mod starts at an even cost, but most have an odd number of ranks. For Serration, it starts at cost of 4 with 10 ranks, total cost of 14. Another mod like Critical Delay also starts at a cost of 4, but it only has 5 ranks giving it a final cost of 9. As long as the pattern of 3/5/10 ranks persists and DE makes every mod start at an even cost, only mods with 10 ranks will end even.