My current character is a multitemplated Old One that has Assimilated (cosmic)/Cherry Picked (via Psychometry (cosmic)) racial traits and abilities that put his ECL at 2,020. He's not perfectly optimized as some of his abilities were acquired via roleplay circumstances, but he's nasty enough that the Demiurge grumbles in its sleep (nightmares), which manifests itself as random monsters attacking my character from time to time.It really would be, assuming you both had infinite Strength to move it and infinite Constitution to not rip yourself apart on it. Also as the material due to it's weight and mass wouldn't be able to rest upon any surface without at least infinite density, you may have more than a few logistical issues to work out trying to do anything with it unless you're a Time Lord, maybe that won't even be enough.
Unfortunately, he lacks infinite anything...except saves (Transilient Saves), Attack Bonus (Ultimate Weapon Focus), AC (Ultimate Defense), and Regeneration (Indissoluble).
He's good at taking a beating and getting back up, but much like Prometheus, could probably be chained to a mountainside and tortured forever.
He has a limited version of Transcorporeality, if that helps, but it's overcome by his own natural weapons (discarded body parts and blood relatives included) and Kuvachim itself might be able to bypass this, but I'm not sure what Kuvachim can bypass.
As he lacks infinite Strength, he could never lift it without "cheating" somehow.