If you understand the Mask character, he can pretty much do whatever his imagination comes up with. When a guy can create things out of thin air, I really don't think a blackhole is out of the question.
But again back to the question: How can Hulk or IM take out Mask or even hurt him?
Mask stomps. His powers literally allow him to defy the laws of reality, as well as create any object he wishes. If the Hulk tried to pull his head off, it'd probably just stretch out in a cartoon-like manner, while the Mask is busy pulling a giant mallet out of his pocket to clobber the Hulk with. And if Iron Man tried to laser him, he'd probably change into beach wear for lols and tank it like a boss. Also, when doing his tornado thing, he is WAY too fast for Hulk or a grounded Iron Man to even tag, never mind hurt.
You put a guy who can literally shoot bullets out of a balloon tommy gun, simply because he wants it to happen, VS Iron Man and Hulk. He is taking them down hard.
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