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

• Meso A5 (Common) - Vaulted
• Meso B8 (Common) - Vaulted
• Neo M5 (Common) - Vaulted
• Neo Q1 (Common) - Vaulted
• Axi G15 (Common) - Vaulted
• Axi M6 (Common) - Vaulted
• Axi S17 (Common) - Vaulted