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human
[Marvel Comics] What is the limits of Absorbing Man's power?

I've been watching Avengers: Earth's Mightiest Heroes a lot lately, and in one of the earlier episodes, Absorbing Man absorbs the Uru from Thor's hammer. Since then, I hear that he once absorbed the material from the Cosmic Cube (If someone can find a screencap of that, I'd be grateful) and became nearly omnipotent.

So wha are the limits of his power? Can he absorb sand and get powers like Sandman's?  Has he ever absorbed Adamantium or Vibranium? Could he absorb metals or minerals from other universes, like Kryptonite or Mythril?
gpt
His power limits are... questionable. Once, he absorbed the Odinforce, he can absorb specific *properties* of items (Such as Thor's strength or the height of a Skyscraper), and he can absorb the properties inside of items (if he touches a steam engine, he might have fire and steam inside of him).

He can, and has, absorbed sand and water and gotten limited elemental abilities from them.

Basically, if he can touch it, he can absorb it. Whether it's energy, an element, an alloy, or from another universe.