How to get Augur Secrets mod in Warframe?

Excuse me, could you clarify how one might acquire the Augur Secrets mod in Warframe? I've heard that it's a valuable mod but I'm unsure of the exact steps to obtain it. Could you possibly provide a detailed breakdown of the process, including any prerequisites or specific missions that need to be completed in order to unlock it? I'm eager to learn more about this mod and how it can enhance my gameplay experience. Thank you in advance for your assistance.