Resonance Stones in "Mortal Shell 2" are highly useful special equipment items that provide significant buffs when equipped. However, obtaining them can be quite troublesome. First up is the Punishment Stone, which you can acquire by completing a trial near Widow's Cliff and interacting with it after the fight.
How to Obtain Resonance Stones in Mortal Shell 2
Punishment Stone 1 – Trial near Widow's Cliff