Originally posted by demigawd
The IG makes you Eternity level. Thanos wrested control from Eternity not because of the IG, but because he WILLED it so. He out Eternitied Eternity.SW destroyed many Eternities with her chaos wave.
that's obviously not completely correct -- clearly without the IG adam never could have even approached eternity, let alone 'ousted' him, but i see what you're trying to say. however, were the IG not above eternity, eternity could have rested back control. he couldn't, so i'd say the IG was above eternity, though still (from all evidence) only a universal power.
that doesn't answer the omniscient question though -- thanos clearly implied he could foretell what was coming before the heroes did it. maybe a bit of pis, but this ability would likely allow him to counter wanda before wanda could do anything. it sort of comes down to this for me -- can wanda's human mind react faster than the mind of the IG wearer? i don't know. is the wearer 'literally' transformed into a cosmic entity, automatically gaining all the IG'S powers, or is it still a mortal who needs to concentrate on the IG to make things happen? if it's mortal mind v mortal mind, wanda may be able to act first. if the latter, the IG wearer could instantaneously stop time (and wanda's thought processes) or do any number of things before wanda could ever act.