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How to get Harrow Prime Systems Blueprint in Warframe?

Harrow Prime Systems 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 Harrow Prime Systems Blueprint

Lith H10 (Rare) - Vaulted
Lith H3 (Rare) - Vaulted
Lith H4 (Rare) - Vaulted
Lith H5 (Rare) - Vaulted
Lith H7 (Rare) - Vaulted
Meso H2 (Rare) - Vaulted
Meso H4 (Rare) - Vaulted
Axi I1 (Rare) - Vaulted

Other items:
Harrow Suffragan Helmet Blueprint - Harrow Chassis Blueprint - Harrow Prime Chassis Blueprint
Harrow Prime Neuroptics Blueprint - Harrow Systems Blueprint - Harrow Crucis Helmet Blueprint