The mycelium pool. Players can add fossils to calcify them into enriched bones.
The Mycelium pool is found in the northern area of the Mushroom Forest on Fossil Island. Players can find Irene here, who will explain what the pool is used for.
The mycelium pool can calcify fossils into enriched bones via a chemical process. This uses both pyrophosphite and calcite crystals. To do so, players must add the fossils, calcite, and pyrophosphite to the hopper. Players should add enough crystals to the hopper so that the chemical process can occur. If starting from scratch, 10 calcite and pyrophosphite must be added to start the enriching process. When players have added enough, the message The pool begins to bubble will display in the chat box. Calcite and pyrophosphite must be added first or most fossils will be destroyed.
Whilst the chemical reaction is happening in the pool, the calcite and pyrophosphite will begin to be consumed, thus players must add more in order to maintain the chemical reaction. In addition, players must poke bobbing fossils that surface around the pool, otherwise the fossils will become too exposed to air and dissolve. Tip: If doing a full load of 26 fossils, 6x calcite and pyrophosphite should be sufficient to make it from start to finish without having to add more chemicals.
A player using enriched bones on the strange machine.
Once the process progress bar has reached zero, players must open the sluice gate behind the Ancient Shroom, and check the rinsing pool to obtain the enriched bones the player deposited in the hopper. These bones are then used on the easternmost strange machine in the House on the Hill to receive Prayer experience.
Each tier of cleaned fossil provides an increasing amount of xp. Small fossils provide 500 prayer xp each, Medium's provide 1000, Large 1500, and Rare 2500 each.
One trip of calcifying and consuming fossils takes roughly 2 and a half minutes. At this pace, the xp rates you can expect for each tier of fossils are 312k, 624k, 936k, 1560k, respectively.
It is important to note that plant fossils can not be turned into enriched bones. If added to the pool, plant fossils will be instantly destroyed, and no products will be received, wasting the fossil.
- The placement and appearance of the Ancient Shroom in the middle of the pool is a likely reference to the mushroom people of the Dark Souls series.