TRY this
you will need +9 rune and no+ rune
then
1st press p.up of no+ rune
2nd press esc and press p.up of the +9 rune
and it will upgrade to +10
do this until you reach +15 rune ^_^
Reminders:
after you LOG OFF and LOG IN again the +15 rune will come back to +9
and the no+ rune will become +6 ^_^
press thanks if i help
MOD
tell me if i am in a wrong section because i don't know if this is a TIP or a BUG ^_^