How to upgrade Tarstones in Mortal Shell 2

You can upgrade Mortal Shell 2 Tarstones to level three, with each level requiring different materials. You'll also do so in different areas of the map, as upgrading Tarstones to level one happens passively, as long as you have the specific Tarstone equipped.However, the higher you upgrade your Tarstones, the harder it gets, and you won't be able to fully upgrade every Tarstone in one playthrough, so you'll have to choose which you want to upgrade carefully. While you think it over, here's every