Talisman of Desolous

The Talisman of Desolous was a Force-enchanted artifact created by Darth Desolous, a Pau'an Sith Lord who, shortly before the New Sith Wars, waged a war with the Galactic Republic with a small army of mercenaries, pirates, and Force-sensitive acolytes.

Description
The Talisman of Desolous took the form of a golden, handheld sphere that contained a single, red-colored kyber crystal embedded on the sphere. The crystal was used to help Desolous enchant the talisman, as kyber was efficient at channeling the Force.

The talisman's abilities were similar to the Scepter of Ragnos, which siphoned Dark Side energy from Force nexuses and could be used to corrupt Force users, cause destruction with its energy beam, and even resurrect certain Dark Siders.

History
Following Darth Desolous' demise, the talisman eventually ended up in the hands of a Jedi Knight in c. 1400 BBY, who attempted to use it to kill the Jedi High Council. He succeeded in his goal, though the talisman itself released far too much Force energy at once, exploding and killing all in the Council Chambers. The talisman, though the red kyber crystal embedded in the talisman remained fully intact. While a number of Jedi Masters were investigated the incident, one took the kyber crystal and, sensing its Dark Side concentration, stored it in the vaults in the Jedi Temple's lower levels, where it would remain until the Great Jedi Purge in 19 BBY, when it was removed by Imperials and brought to Darth Sidious for examination. Sidious then gifted the crystal to one of his Inquisitors, who used it as a lightsaber crystal.