How to get Ash Prime Blueprint in Warframe?

Ash Prime Blueprint 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 Ash Prime Blueprint

Other items:
Ash Locust Helmet Blueprint - Ash Chassis Blueprint - Unleashed
Ash Prime Chassis Blueprint - Purging Slash - Crash Course