RWBY x Ben 10 crossover

The one who summoned me...

When I woke up I was blasted with my scroll alarm, slowly my eyes opened and even though they didn't want to stay open I forced them to remain still. I looked groggily over to my scroll as I grabbed it lazily and looked at the alarm I had set the previous night. "Pick up Ultimatrix? Oh yeah I forgot about that..." I yawned as I slowly started closing my eyes again out of sheer exhaustion from how much dancing I did last night but as I did a hologram blasted out of my scroll of Azmuth.

"Ben Tennyson, you better not be planning on going back to sleep." Azmuth glared at me as I sat up and let out a stretch.
"It was my plan yes, Can't I pick it up later?" I asked as Azmuth shook his head.
"No." Azmuth simply said before he hung up the call leaving me to groan, I didn't want to get up however I knew I had to.
As I slowly got up and looked down to my wrist which was about to be covered by the Ultimatrix I said my final goodbye before getting changed and leaving my room. As I left the room I plugged some headphones in and started listening to some music, this world didn't have any music I'm used to but there is some that I liked. "Red like roses." I hummed to myself as I made my way over to Beacon Tower.

As I made my way over to the tower Ruby left the elevator with a satisfied look on her face. "Ruby, how're you doing?" I asked as I approached her, she gave me a smile as she waited for me to approach.
"I'm doing good, did you hear about what happened whilst you were at the party?" Ruby asked as I shook my head.
"No, what happened?" I asked.
"Someone broke into School Security last night; I fought them off and managed to subtly mention the southeast." Ruby smiled.
"Well, if the assailant mentioned it, the investigation into the southeast would speed along. Good job Ruby." I smiled as Ruby awkwardly smiled back.
"W-Well I have to go back to my team, see you later Ben." She hurried away, I looked at her confused before shrugging and getting in the elevator heading up to the tenth floor.

As I scanned my handprint to open the office a few extra beeps went off, a new eye tracker scanning my eye before the door was unlocked. It makes sense Azmuth put extra security here, don't want anyone else finding him like Team CVFY did. At the thought of my friends returning a smile grew on my face before I took a step into my office, shutting it behind me. Azmuth was hard at work at a prototype device that looked like a camera, he was tinkering away happily with various ideas brewing in his mind. "Hey Azmuth." I spoke up, the Galvan looking over to me before going back to his invention.
"Ultimatrix is over there Ben, try not to make too much noise. I don't want to be distracted right now!" Azmuth said as he continued to tinker away at the device.
Happily I approached the watch and slipped it on my wrist, the Ultimatrix changed in size to fit to me before beeping to life. I was about to leave until the watch spoke up.

Planchukúle Unlocked.
Nosedeenian Unlocked.
To'kustar Unlocked

"Woah that's cool, new aliens." I grinned, Azmuth looked at me confused.

"I didn't set any new aliens to be unlocked...curious." Azmuth said concerned.
"Doesn't matter, these ought to help me out-" Before I could say anything else I felt a sharp pain fill my mind, I clutched my head in pain letting out a roar of pain before everything turned to black.

Slowly I opened my mind to find myself in a familiar black space, I hadn't been here in a while. I looked around curiously and in the distance I could hear the clanging of metal, I slowly tried approaching the sound however the sound kept getting further and further away. I reached out, trying to yell at the noise but not a word came out of my mouth before a mirror appeared in front of me. I gasped as I looked in the mirror, on the other side wasn't me...well it was. Before me was a towering 6'7 version of me with grey strips running through my hair and wearing a white and green t-shirt, on his wrists were two devices that resembled Omnitrix' but completely different design and look wise. "Hey there Ben, or should I say me? It's been a while since I had to deal with the time travel stuff personally." The future me said, my jaw dropping as I heard his voice.
"Ben ten thousand...Why are you here?" I asked as the older me looked down, as if remembering a tragic event.
"It's a long story...look right now you're in a gateway between worlds, I will be able to talk to you here whenever you come here. Our time is short so when you get back, search for a man named Paradox. It's best if he explains most of it, he is better at the timey wimey stuff," Ben 10k said as slowly I felt my eyes drifting shut "Good luck kid, don't fail like I did." My older self said before I jolted up in a sitting position.

I was panting heavily as I clutched my chest and looked around, my surroundings had gone back to being my office with Azmuth looking over me with a concerned look on his bug-eyed face. "You're up, good." Azmuth sighed as I looked at him.
"Azmuth, do you know of a Paradox?" I asked as Azmuth glared at me.
"Where did you hear that name?" Azmuth asked.
"I...In my dream...I think he might be the reason I made it to this universe in the first place." I said to the creator of my watch.
"Impossible, Professor Paradox told me he wasn't the one responsible. It's curious how you know his name, but I don't know where he is. Now tell me of this dream." Azmuth demanded.
"I...I was in the same place I found myself in when I first got to this world and when the Ultimatrix was first given to me, I heard a metal clanging and after I looked in the mirror...I saw my future self." I summarised as Azmuth squinted his eyes.
"Your future self?" He asked.
"Yes, he said to ask Paradox about what happened. He should have the answers." I responded.
"I see...then my theory could be accurate." Azmuth sighed.
"What's the theory?" I asked.
"There is only one species in our universe who would have the ability to take you to another universe...A CelestialSapien." Azmuth said as he looked at me seriously.
"A...CelestialSapien?"