Talk:Meruem/@comment-7366099-20180608141159

Multiplier starts with x1 and for each rune dissolved the multiplier increases with x0.04. So every 25 runestones dissolved the multiplier increases with x1 to the max of x7. Multiplier doesn't get reset and it doesn't look like it can get reset by Neutralise skills either.

That means you need to dissolve 150 runes before you reach the max x7 multiplier.