How to get Athodai Prime Barrel in Warframe?

Athodai Prime Barrel is an item dropped from Void relics.
You can find the list of relics below, and click on the links to see how to get them.

Relics dropping Athodai Prime Barrel

Other items:
Athodai Prime Receiver - Athodai Prime Blueprint - Athodai Barrel
Athodai Receiver - Athodai Blueprint