How to get Hydroid Prime Blueprint in Warframe?

Hydroid 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 Hydroid Prime Blueprint

Other items:
Hydroid Chassis Blueprint - Hydroid Ketos Helmet Blueprint - Hydroid Prime Systems Blueprint
Hydroid Triton Helmet Blueprint - Hydroid Prime Neuroptics Blueprint - Hydroid Prime Chassis Blueprint