Crescent Cutlass
From The Fool's Aftermath Wiki
The Crescent Cutlass is a magical cutlass of incredible power, designed by the Kinemancers as a safety mechanism against the Potential of Infinity. It alone has the power to destroy the Potential of Infinity. It was stored in a mantle of stone in the caldera of Mount Whaken and was retrieved by an envoy sent by Nala Blazebough in 1927 PR. It is currently in her possession.
