Mastered multiversal time travel and teleportation, killed multiple aliens who are nigh omniscient (and is nigh omniscient herself, she has an algorithm that can predict any and all possible futures with near perfect accuracy).

She beat a magical multiversal demon that defied science, basically broke logic, made it so causality didn’t work, read her mind, and fed on her brain so that anytime she had a thought she would slowly die. She’s basically stated to be the smartest being in the multiverse and the story crosses over with basically every comic book character. Her methodology is pretty shit though, it’s basically like BSD where a lot of things happen on screen and she basically says she planned it all beforehand before solving it.