The Single Most powerful *thing* in FFXIV?

[akita_kt]

I thought Alpha's robot buddy was a fake.

Is it implied (or otherwise explicitly stated) that this is somehow the actual Omega? Or were you referring to something else?
That final cutscene still tugs at my heartstrings, though.

As for most powerful thing, I wanted to point toward Ultima, but neither spell nor high seraph proved to be anything but disappointing.
Midgardsormr is probably up there, and he's definitely not "spent." He's just napping. Source: https://na.finalfantasyxiv.com/lodes.../#sidestory_08 Fun fact: This story also mentions the replica Omega.
However, I would still say the greatest threat we're aware of would probably whatever star was at war with the Dragonstar, if they're still around (I don't recall). Omega is scary, but it's just a weapon.

OMG is Omega, as seen here: https://na.finalfantasyxiv.com/lodes.../#sidestory_03 . Instead of dying, it found a new body to use. The body is also kind of useless, so unless OMG dies and Omega finds a new body to snatch, the robot is stuck on a toy for a while.

And I'm of the opinion Omega's masters are dead by now, as the lyrics from From the Heavens and eScape make it seem, and also as Midgardsormr implies here:

[Bright-Flower]

OMG is Omega, as seen here: https://na.finalfantasyxiv.com/lodes.../#sidestory_03 . Instead of dying, it found a new body to use. The body is also kind of useless, so unless OMG dies and Omega finds a new body to snatch, the robot is stuck on a toy for a while.

And I'm of the opinion Omega's masters are dead by now, as the lyrics from From the Heavens and eScape make it seem, and also as Midgardsormr implies here:

I thought so, honestly the cutscene from OMG's point of view at the end of the Omega story would have felt really weird if it wasn't supposed to be Omega inside of it.