Who can beat or hurt a Celestial?
I keep hearing how amazing a power of a Celestial is, but all I see is (from wikipedia): Nearly unlimited cosmic power for use in any application
Sure that is strong, but doesn't seem like much comparing him to Mephisto in his own dimension, Spectre, Galactus (though I know Galactus was amazed when a Celestial was beaten), Void, and many others.
Who can hurt a Celestial? Can Earthlings beat a Celestial? Can Dormammu defeat a Celestial? Can Mephisto in or outside of his dimension defeat a Celestial?