How to upgrade Tarstones in Mortal Shell 2
This guide details how to upgrade Tarstones in Mortal Shell 2, explaining that upgrades to level one are passive with XP, while level two requires 100 Coins at the Tarforge after giving Etching Needles to Franz. Level three upgrades require a level two Tarstone, enough XP, and six Tarcores at the Tarforge. It's noted that players cannot upgrade all Tarstones in a single playthrough.
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