Barrington's Eye

An angular amethyst set in a gold housing. The Eye functions as an arcane focus, but also whispers arcane notions and thought-experiments to Henry Barrington. The Eye contains 1 abyssal charge, which Henry can spend to "open" the Eye. When opened, Barrington's Eye grants advantage on a single knowledge-based test. The Eye then becomes dormant, and will regain it's charge at DM's discretion.