Vader’s Plan to Use an Ancient Jedi and Sith Artifact to OVERTHROW Sidious

The Non-Canon Expert describes Darth Vader’s first plan to overthrow Darth Sidious, where he planned to ally himself with an ancient Jedi locked away in stasis for 4,000 years named Celeste Morne and obtain an ancient Sith artifact called the Muur Talisman. This story is a Legends one that was seen within the «Dark Times» comic, specifically the Vector arc with Issue #11 and Issue #12.