The Drifter examines the blueprints you found. Turns out that the Fallen are using Praksis's armor tech to create a weapon capable of channeling Stasis energy. Eramis had plans to distribute this weaponry to Fallen all across the system, expanding the capabilities of her army.
Drifter likes the idea so much that he immediately cooks up a plan to steal the prototype from the Fallen. He thinks Spider's associates might be able to offer some insider information too. While he looks over the blueprints and calls in a favor, he asks you to go to Europa and gather more intel on the prototype.