Star Butterfly!
With Toffee and Meteora defeated, I was helping Eclipsa get the anti Eclipsa Mewmans on her side.
And that's when Brainiac showed up, he gave an ultimatum: Surrender the source of Meni's magic or he'll be taking it by force. And I'll be honest, when Brainiac began laying waste to Mewni killing anyone who got in his way or were running for their lives. At first glance, I honestly thought that he was going to be like Toffee in terms of brainpower but with the strength of Mina Loveberry. Yeah, that psychopath. And in terms of brainpower, I was kind right. Only he was waaaaay smarter than Toffee. But in terms of strength, he was really stronger than most of the giant monsters that I fight on a day to day basis.
However, while Brainiac had the strength and smarts advantage, he was no match for my skills and the immense power of my inner magic.
When I confronted him on his ship, it was quite the battle and despite his advantages, I ultimately won out due to him underestimating me.
"Yeah! That's what you get for try to collect Mewni, smart guy!"
With Brainiac stopped and his ship now a pile of scrap in the sky, I was then faced with stopping this guy called "Superman" who Marco told me about and his Regime of murderers who claim that they're superheroes and that they are "doing what needs to be done" about three months later. And fighting them was even worse than killing that smarty pants.
I could immediately tell that they weren't holding back as our battle devastated Mewni. That's how bad it was.
Thankfully, due to the inner magic of my Mom, Eclipsa, Meteora and me, we managed to at least hold our own using our butterfly forms and make them retreat back to their own dimension, though Superman promised that should we decide to invade their home, he was going to kill us.
We chose to heed his warning and decided not invade his universe despite having the dimensional scissors and portal magic.
After that, a blue colored portal appeared in front of us, much to my chagrin. As this magician named "Dr. Fate" came out of it.
After explaining why he was here, he told us that he wished for us to join this "Mystic Alliance" thing he was creating. After bringing him to the castle to dicuss this, with Hekapoo since Rhombulus and Omnitrazus were missing in action at the moment, not that I cared really about where they were, we came to a decision.
We would join but only if we operate from Mewni and would only help on occasion.
The good doctor accepted and conjuring up another portal, he went back to his dimension.
So, let this be a warning to anyone else who tries to destroy Mewni or anything along those lines.
"I hope your ready to get your butt kicked, your neck snapped and get Narwhal blasted in the face!"