The Eldritch Rune is a Story Item. It is used during the Prologue as one means to control the machine locking Shadowheart in her Mind Flayer Pod.
A strange energy buzzes through this alien object. You are sure you've never seen any of the like, yet part of you recognizes it as a component of some bigger machine.
Properties
Miscellaneous Items
Rarity: Story Item
Weight: 0.2 kg / 0.4 lb
Price: 1 gp
Where to find
Found within the Elaborate Reliquary in the same room as Shadowheart aboard the Nautiloid.