Relic

The Relic is a bio chip appearing in Cyberpunk 2077.

Overview
The Relic was created by Arasaka as a prototype chip that grants the user immortality. How the chip works is very mysterious and unknown.

Somehow, the Relic has unleashed the "ghost" of Johnny Silverhand into V's mind after it was stolen by him/her and Jackie Welles.

Reference
Reliquia