The pattern follows as this: Starting with 0 (air runes), add 2 (lv 2, mind runes), then add 3 (lv 5, water runes), then add 4 (lv 9, earth runes), then add 5 (lv 14, fire runes), then add 6 (lv 20, body runes), then add 7 (lv 27, cosmic runes), then add 8 (lv 35, chaos runes), then add 9 (lv 44, Nature runes), then add 10 (lv 54, law runes), then add 11 (lv 65, death runes), then add 12 (lv 77, blood runes), finally add 13 (lv 90, soul runes) 2,3,4,5,6,7,8,9,10,11,12,13 Thats the pattern. of course no skills have lv 0, so lv1 is the starting point for leveling.