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.

The chip needs to cool at a constant 2-8 degrees celsius or 35.6-46.4 degrees fahrenheit, otherwise causing slow permanent damage to the chip when outside recommended temperatures.

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

It was created by Anders Hellman.

Reference
Reliquia