Gravity falls return (Bill Cipher X Demigod)

Summoning him

I was running through the forest, exercising and listening to music it's funny how the music background helps me focus. As with all other half-bloods, I Have ADHD and hyperactivity but not dyslexia for some reason. If I have a distraction I focus easier. Then I decided to practice my magic. In camp Chiron told me that there's a prophecy about me something about the possible apocalypse and how the weight of the world will be on my shoulders and possible earth's end. Ya'know the usual for half-bloods. He also told me to practice and learn as many things that I can. I invented special pins that put you in another dimension. You adjust to the dimension you are in I became someone from that dimension. I developed, got new powers but the weird thing is that I never lose my power and abilities or knowledge  I got in the last dimension I was in. I don't even know all of them and sometimes the powers are too much for my human form so I lock some of them in my necklace and or kill it. Soo I was running and gone past the same circle that was in my dreams I took a better look at it and notice there's a book laying on the floor open on the page with pictures of tortilla chips guy in the core of the wheel. And some words underneath it. What the...
I read words out loud and nothing happens for a second. Then symbols started glowing like in my dream and time slowed, everything went gray and I heard a laugh. A black triangle with flames from corners appeared in the sky. I took a step back. the triangle turned yellow and started to talk. "Oh, oh Gravity falls it is good to be back! The name's Bill Cipher, and I presume you're some kind of medusa? Haha just kidding I know who you are Amelia Elisabeth Snow."." Who ...what are you? How in the name of Hades do you know my full name?" I asked suspiciously."Oh I know lots of things. (slow voice) LOTS OF THINGS.But really not so much about you as I would wish to know." Bill answered "You know what? Nevermind. I didn't mean to summon you so go and leave me alone," I said. "I'll just listen to some music. I put my speaker on so I could ignore the guy that's named Bill Cipher. I put on roundtable rival cuz I Just Love the song and dance

But I accidentally set the tree on fire. I quickly draw a blue circle and water appeared out of nowhere and put the fire down. My hands glowed green and the tree emerged from ash back at being green and majestic as nothing happens. But I shouldn't do that in front of Bill because I saw him looking at me with the look in his eyes I didn't like at all. "Oh this just becomes a lot more interesting," he said.