Rahool barely looks up from his datapad as you approach.

"Engrammic computation is the process of encrypting matter as data. I don't think I can go into more detail than that without some supplementary reading on your part, but suffice to say that engrams are quite valuable to Guardians like you. Who knows what treasures of days gone by lay waiting to be unsequenced?"

For a moment, his dour countenance breaks and he smiles giddily, but he promptly clears his throat and furrows his brow.

"The Cryptarchy is at your service to continue your education in engrammatic sciences, and to aid with decryption. I look forward to what you bring me next, Guardian."