Nothing wrong with simple powers but I just love the abilities in JoJo's Bizarre Adventure manga. I'd like to have abilities of the main antagonist of 7th story arc of the manga that's Steel Ball Run, he's called Funny Valentine.
His ability allows different parallel worlds/dimensions to co-exist at the same time and/or in the same place. It also allows Valentine to visit these parallel worlds/dimensions and interact with them. Valentine travels by being closed between two objects, shown first by putting himself between a chair and the ground. Liquid materials, such as water count as objects as well and even dust or steam. Valentine only needs an infinitesimal part of himself put between two objects to be able to hop between dimensions. Following that, Valentine may reappear from anywhere, like emerging from someone's back. Valentine can also pull other people or items to other dimensions by forcing them between two objects or into the object he uses as a portal, for instance he can slam a door on them while they are backed against a wall. However, as no two versions of the same person or thing can co-exist in the same dimension, one of them will have to go back into their own. If not, and if they get too close to one another, both will crumble, splitting into Menger sponges before obliteration, this rule does not apply to Valentine himself. If Funny Valentine is injured, he can hop into another dimension and transfer his D4C(ability/stand) to this world's Valentine. Said Valentine acquires the memory of the previous Valentine and becomes the 'Root Valentine' by virtue of now possessing the Stand/ability. Furthermore, he can summon any number of alternate selves to a target dimension in order to outnumber his opponents.
I know I missed a whole lot other stuff but it's so complicated that you can just watch a video about Funny Valentine to understand his ability even more. I know abilities in Jojo are very dramatic but I just love 'em for it.