It's been a while since the mystery key were mentioned in the series Grimm. Renard said people have theories on what the keys might unlock:
- Elixir of Immortality
- Scroll of Alchemy
- Mohammad Ali's Authentic Sword
- Nail of Jesus' Crucifix
There's something more. Connecting the dots, I found that ther Grimm storyline is starting to move closer to Assassin's Creed storyline... I mean, come on; 15~16 century Constantinople (Ezio Auditore was there in 16C); seven keys unlock a lock with an artifact contained within ("Masyaf Keys" much?); Grimm family and the Royals fighted centuries for a few keys (Same goes to the histories of Pieces of Eden); the artifact itself has the power to control the world? Everything match the properties of Pieces of Eden. Could it really be another piece of Eden? If so, my money's on Ali's Sword.
Any thoughts?