The Marvel Cinematic Universe has famously introduced us to the concept of multiple/alternate universes.
We were first introduced solidly to the multiverse within the MCU in Loki Season 1 1. And has introduced us to the concept of the Sacred Timeline - Earth-199999.
There is also a meta-concept of Marvel's multiple cinematic multiverses with the whole Fox/Marvel/Netflix cinematic universes (each receiving their own "Earth-xxxxx" delineations).
The most notable recent ones are:
- Earth-10005 - The X-Men Cinematic Universe, the universe where all of Fox's X-Men films take place, including the spin-offs like Logan and Deadpool.
- Earth-96283 - The Spider-Man Cinematic Universe, where the three Spider-Man films starring Tobey McGuire take place.
- Earth-120703 - The Amazing Spider-Man Cinematic Universe, where the two Spider-Man films starring Andrew Garfield take place.
Consequently, we see that basically every character has many versions or variations of themselves, living within the multi-verse - aptly referred to as "Variants" - leading to a fun way of exploring these variations on-screen, and a tough job for the TVA to keep track of!
We are then given further insight into the Multiverse within the MCU by Oatu "The Watcher" in Marvel's What If... series on Disney+.
I'm intrigued by this idea though. There seems to be only 1 Oatu "The Watcher". He watches the entire multi-verse and as far as we know, has no variants.
My question is: Which Marvel Cinematic Universe beings are unique across the multi-verse?
I've heard that there's potentially only 1 Phoenix Force, and I suspect there might be potentially other beings who have no variants, such as:
- Dormammu
- Galactus
- Ego
- Celestials
- Alioth (likely, as it lives within the Void and was created during the multiversal war.)
Related question (but not dupe)2:
- The first inclination being the way Doctor Strange can see multiple possible futures, but Loki was the first to delve into the multi-verse proper
- I'm specifically interested in the MCU's multi-verse and not the Marvel (Earth-616) multi-verse