Sadistic Blackmail

Sadistic Blackmail was a virtual representation of one of Arno Dorian's genetic memories, relived by a Helix initiate through the Helix Navigator.

Description
Arno returned to the Marquis de Sade after the latter was released from custody.

Dialogue
Arno retrieved the four pieces of blackmail and returned to de Sade.
 * De Sade: Dear fellow! I very much appreciate the inexplicable disappearance of my death warrant. Now, the joys of retribution! After your "removal" of Grignon, my political enemies became reckless. I happen to know that each one is hiding a delightfully salacious secret. Here is a list of items to blackmail them. Steal those items and Grignon's old, debauched neighborhood will remain under my gentle care.
 * De Sade: Ah, yes. Thank you, Arno. I take such pleasure imposing my will on others. Is that wrong?

Outcome
With blackmail in place, the Marquis de Sade took back control of his previously-acquired facility.

Reference

 * Assassin's Creed: Unity