Talk:Gathering Storm/@comment-24740282-20180222212218/@comment-17903049-20191228225545

You get x stacks every 10 minutes, where x = minutes/10. So at 10 minutes you get 1 stack, 20 gets 2 stacks, 30 gets 3 stacks, etc. But those add up, so at 10 minutes you have 1 stack, 20 have 3 stacks, 30 have 6 stacks, etc.