Cancer

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

Description
Arno solved several riddles to find a part of the Nostradamus Disc.

First riddle
On a Church that will stand, For a thousand years or more. Three spires reach to Heaven, The truth lies on the tallest one.

Second riddle
In the playground of the wealthy, Assembled by the Medici clan. The grand foyer will transport, To the highest social ranks.

Third riddle
The font of knowledge, Plaything of angels. In the garden of life, Man first learned Sin.

Fourth riddle
Beneath your feet, The rich hide their secrets. The sundial counts days spent, Amidst the worms and bones.

Outcome
Arno retrieved one of the fragments of the Nostradamus Disc.

Reference

 * Assassin's Creed: Unity