All or Nothring
From The Fool's Aftermath Wiki
The All or Nothring is a magical ring that allows its user to either succeed greatly at a task or fail greatly. It is enchanted with chronurgy magic. Thordan Leadbow gifted it to Kaladin Rakkan as a wedding gift commemorating his marriage to Lovreas Jaderiver.
The ring takes the appearance of an ornate metal ring, with a tentacle that can spin around its circumference. It is activated by spinning the tentacle.
