First off i didn't know what section to post this in.Mike's Prayer Guide for TonicScape
First of all make sure you are at Edgeville. You will need to go here on your map.
Next you will want to trade with the shop keeper shown here.
Then you will want to buy big bones. They are 2k each.
You will then want to go and use the bones on the altar shown here. (DONT BURY THEM.)
It will take you a fair few bones to get to 99, but this is the easiest and fastest way to get 99.Good Luck!