Vanguard C1 Relic content

The Vanguard C1 Relic contains the following Prime components and blueprints:

Protea Prime Blueprint	Ember Prime Chassis Blueprint	Volt Prime Blueprint
Mesa Prime Systems Blueprint	Ash Prime Systems Blueprint	Caliban Prime Systems Blueprint

Vanguard C1 Relic: Drop sources, locations, and probabilities

The Vanguard C1 Relic Relic is vaulted and doesn't drop in any mission currently.
However, players can still trade it or its contents.

Other items:
Rhino Vanguard Helmet Blueprint