Primal ashes

Primal ashes are a 100% drop from the Abyssal dragon. They can be scattered for 480 Prayer experience, taken to the Ectofuntus for 1,920 prayer experience or used at a POH gilded altar with both incense burners lit for 1,680 prayerexperience. Note that if you use demon ashes on the Ectofuntus, you do not need to use them on the bone grinder to produce Bonemeal. The Primal ashes give the best prayer xp from all the other ashes(eg. Infernal ashes]). But the ashes are untradable, so they can only be obtained as a drop from the Abyssal dragon.

They can also be used when killing the demons mentioned above to fill a Primal urn. It takes 25 primal ashes to fill a Primal urn. A full primal Urn grants 13,200 experience when teleported (equivalent to 528 experience per primal ashes, which is an extra 10%).