The Mad Queen
Memento Mori. Unus Anus
hand to hand is a joke to portal masters they punch you open portal hand goes in postal closes no more hand or just portal them out into the heart of a sun the other side of the universe another dimension as they try to hit you. anyone that thinks for a moment on how to use their portals in combat would come up with these which counter acts the lack of combat skill as they don't need to fight.
Didn't Coyote use his portal creation powers to decapitate Daredevil and many others?
That's right, he did. He kept their heads alive by using portal stuff.
And
Wong chops the hands off of one of the Black Order bois with a portal
Portal creation is powerful enough on it's own.
You don't need to add a "limitless" bit to it. Even opening a portal between a populated city and an active volcano would do enough damage. Furthermore, if Amelia was such a threat there would be more than just SHIELD after her. Most of the Marvel cosmic stuff would be there too. Andrita
EDIT- I have a character in another RP who can open portals to a ghost dimension. He could easily use this power to kill folks, but he has a strong moral compass...And he can't cast magic in front of regular mortals.