League of Legends Reforged Rune: Gathering Storm

Every 10 minutes, gain AP or AD, adaptive.

10 min: + 8 AP or 5 AD
20 min: + 24 AP or 14 AD
30 min: + 48 AP or 29 AD
40 min: + 80 AP or 48 AD
50 min: + 120 AP or 72 AD
60 min: + 168 AP or 101 AD
etc...