Rune obelisk

If you can defeat the creature protecting the Rune Obelisk then you will earn one free skill point.

There are several locations for these obelisks. The first is in Homestead, behind flying creature. The second is located in Nightscream beyond the fire gate which is guarded by Ogre elite. The third is located in the Tiros Academy while running the task "The Storm Portal". When looking for the rune keys for the portal, the North-East "boss" mage is guarding one.