Sorrowstones and Shardstorms
This blood red glowing crystal hovers about your head, bathing you in candle-bright red light.
You make saving throws against ongoing typed damage at the start of your turn instead of at the end of your turn.
You gain a +2 bonus to all Charisma-based skill checks when dealing with servants and cultists of Ul-Athra.
If the Blood Jewel is ever set in the reconstructed Crown of Dust (an artifact composed of three lesser artifact fragments) then undreamed of powers could be unlocked.