OK I’m going to detailing the keys and and each one can do:
1. The shadow key: allows you to command and control great and powerful shadows. Current Owner: Dodge.
Previous Owners: Sombra and The Merchant.
1A. The crown of shadows/shades: Allows finer, and more physical shadow creatures. Current Owner: Dodge.
Previous Owners: The Merchant.
2. The matchstick key: allows you to burn anything. Current Owner: Dodge.
Previous Owners: The Merchant
3. The echo key: allows you to bring back the Dead. Current Owner: Dodge
Previous Owners: The Merchant
4. The identity key: allows you to change your shape and form. Current Owner: Dodge.
Previous Owners: Chrysalis, and The Merchant
5. The omega key: allows you to control demons, Also the key provides metal to make the other keys.( only use as last resort) Current Owner: Dodge.
Previous Owners: Fluttershy, and The Merchant
6. The mirror key: allows you to trap things in mirrors. Owner: Dodge
Previous Owners: The Merchant
7. The forge key: allows you to make anything. Owner: Dodge
Previous Owners: N/A
8. The head key: allows you to enter some one mind. Owner: Dodge
Previous Owners: The Merchant
9. The mending key: allows you to fix anything as long as it’s not a life. Owner: Dodge
Previous Owners: The Merchant
10. The ghost key: allows you to become a ghost without death. Current Owner: Dodge
Previous Owners: The Merchant
11. The mimic key: allows you to mimic anything you have seen before. Current Owner: Dodge
Previous Owners: The Merchant
12. The Leach/Hell key: allows you to steal magic from others. Current Owner: Dodge
Previous Owners: Tirek, and The Merchant
13.anywhere key: allows you to go anywhere As long as there is a door. Current Owner: Dodge
Previous Owners: The Merchant
14. Chaos key: allows sane to one who is Insane. Current Owner: Discord
Creator: Dodge
15. Animal key: Allows you to summon fourth beasts, or become an animal. Current Owner: Dodge
Previous Owners: The Merchant
16. The Great Lock: a enormous lock, its purpose Keep Tartarus sealed and defend against all, but, the Owner of the Chain Key. Creator: Dodge
17. Chain Key: the only permanent weakness of The Great Lock. Owner: Dodge
18. Keyhouse Key: creates a physical entrance to Dodge’s home. Owner: Dodge
Creator: Dodge
19. Time-shift Key: the third most powerful key (if used properly) allows the power of time manipulation to those who know how to uses it properly, otherwise can only be used with a grandfather clock.
20. The omni-periscope Key: allows anyone to see through the multi-verse if in possession and know how to use it if not can only be used with a periscope keyhole in it which will appear no matter what if you have the key