I'm gonna change the story idea "Izuku Midoriya-Sayan Warrior" a bit
Also, this is a story inspired from TheHomieMeech and WhenzleyValenzuelaCo
Izuku was sent on the ground in his Super Sayan 3 form by Super Sayan Blue Evolution Vegeta
Vegeta:You're a fool for not taking Lord Beerus offer to train.
Izuku got up
Izuku:*weak* Maybe, but I want to get stronger on my own.
Vegeta:Then show me, Brat. Show me you'r power. Or Super Sayan 3 is all you got.
Izuku:You should know by now, Vegeta. Never underestimate you'r opponent.
Izuku rip his gi, leaving him shirtless
Then Izuku begin to power up, making a golden sphere surrounded him
Vegeta:If you think just by powering up a little will make a difference, you're a Fool.
... :RRRRRGGGGHAAAAAHHH!
Vegeta:What?
Goku:What's happening? Where did that roar come from and why Izuku power is growing like crazy?
Hisashi:He's using his training.
Lord Beerus:Looks like that Brat is not useless like I thought.
From the sphere emerge a head of a Golden Ozaru
Then they saw Izuku changed
His long blonde hair got short and turned black
He got taller and muscular
His tail became red
He got covered in red fur
Izuku:Now, let me show you the power of a Super Sayan 4.
Izuku power erupted like a volcano
Vegeta:I know this form from the other me. This form is no match for me.
Izuku:You're a fool, Vegeta.
Vegeta:*angry*WHAT DID YOU CALL ME, BRAT!?
Izuku:Open you'r eyes! You're a Sayan trying to imitate a God. While I'm a Sayan connected to my Primal. My Roots.