How to get Grendel Prime Neuroptics Blueprint in Warframe?

Grendel Prime Neuroptics 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 Grendel Prime Neuroptics Blueprint

• Neo M5 (Common)
• Axi S17 (Common)
• Meso A5 (Common) - Vaulted
• Meso B8 (Common) - Vaulted