Crystal saw (Prifddinas)

The crystal saw (prifddinas) is a degradeable saw that is made by Crystal Singing with a crystal tool seed and 500 harmonic dust. This requires 80 Smithing and gives 500 Smithing experience. Alternatively, you can pay Ilfeen or Eluned 1,000,000 coins to turn a crystal tool seed into a crystal saw (prifddinas), without any harmonic dust or 80 Smithing.

The saw gives a hidden 5 level boost to Construction that lets you build furniture five levels higher than you would normally be able to. This advantage is not applicable when constructing things that do not require a saw, such as monsters, plants, or rooms. This bonus is stackable with drinking teas, sculpting chisel and spicy stews that already boost this skill, only for objects requiring a saw to make. If a player has both a normal saw and a crystal saw in their inventory when building furniture, the crystal saw will be used and a charge will be deducted, even if the player has the requisite Construction level for the piece of furniture and does not need the crystal saw's boost.

Once it has been used to build 28 things, it will degrade into a crystal tool seed. The tool seed can be recharged by Ilfeen or Eluned for a cost that starts at 1,000,000 coins but decreases the more times you've done it. You can also talk to Ilfeen and Eluned if you want to turn your saw back into a seed.

Like the other crystal tools, the saw doubles the chance of getting Construction golden rocks and strange rocks from Shattered Heart. It also increases the speed of cutting planks in the Sawmill training activity.