The Exo Stranger is pleased with your progress acquiring and learning to use Stasis, but explains it can still be further enhanced.

She reveals herself to be Elisabeth "Elsie" Bray, granddaughter of Clovis Bray I. His experiments on Europa were filled with deceptions and secrets—the most important of which may have involved Exos, Darkness, and by association, Stasis.

Acquire his digital journal, and you're bound to discover further truths about Stasis. But the journal is currently locked.

The Exo Stranger removes a symbol from her own body and hands it to you, calling it a Skeleton Key. In order to access the journal, you must first empower the Skeleton Key with Stasis energy.

Follow the Exo Stranger's guidance to empower the Skeleton Key.