Begin the riddles is a mission objective in Assassin's Creed: Unity (ACU)

"Find the symbol" is a mission objective in Nostradamus Enigma / Mercurius

Walkthrough[edit]

When you begin this memory, Arno takes a book, the Idcirco Problemata. This is down in the basement of the Cafe Theatre.

Interact with the Mercurius Symbol that sits just in front of where you get the memory. To do this, use Eagle Vision so it becomes plainly visible. This will give you the first riddle.

Objectives[edit]