like the titles says I say Bleach. Not including planet busters ect.
JoJo's Bizarre Adventure.
Adaptive evolution+immortality, time stop, time erasing, time acceleration, time looping, alternate universe travel, and that's just the main villains. Even the most mundane sounding abilities (such as Part 6's protag Jolyne's, she can unravel her body like string) can be used in hax ways, such as when she receives a punch from someone who can turn things inside out, she turns the punched part of her body into a mobius strip, completely negating the ability.
This is all before even bringing Gold Experience Requiem into the picture, which essentially makes its user invincible, since anything directed at it is reset to 0.
Hax mean having a power that give you a great edge and have little to no drawbacks. Here an example, Chao Lingshen from Negima have a device that allow her to avoid any attacks, making it impossible to hit her, but she can hit you
Anyway, I would say JoJo's Bizarre Adventure or Negima
@DBZ_universe: Maybe. There is a multiverse in the first FMA series. Yet if we were to ask her and get answers, that may ruin the mystery of Truth and what truly lies beyond the gate. She probably won't tell anyone because of that. The gateway itself and Glutton'ys stomach are kind of like other dimensions themselves; maybe they are.
If Hiromu Arakawa says that the Truth is omnipotent, then the Truth is omnipotent. I guess that puts the Truth on the same level as The One Above All and Kami Tenchi. (Hell yeah!)
@KingOfAsh: Well when I was reading on the FMA Wikia of Truth like a year ago it says is "Omnipotent" and then I opened up a thread and some user said that in an interview Arakawa did said that Truth was Omnipotent. This is the link to the thread. http://www.animevice.com/forums/general-discussion/1/is-the-truth-fma-omnipotent/332274/
Also Father obtaining Truth is loli to me since I believe he absorbed what was inside the gate and not Truth.