The phrase "immeasurable power" refers to a tremendous amount of strength, influence, or capability that cannot be easily measured or quantified. Full definition
Well, here you go then, here's a whole trailer all about Skullgirls» Story Mode, so you can get the jump on being immersed in this saga of a lost artifact of immeasurable power and... oohh look here's some face - kicking. (gamesradar.com)
It is at the start of the game that we learn that Ryu's village has been destroyed and the sacred scroll Bushido stolen, which is apparently disastrous, being a source of immeasurable power. (gameluster.com)
They are Space, Mind, Reality, Power, Soul, and Time; six elemental objects created at the birth of the universe that wield immeasurable powers. (movieweb.com)