Finn vs. Rap Bear

Yo!
Check, check, one two!
Hey, I'm Rap Bear
I can rap
Like that
Ha ha, I'm back
It's a battle of rhymes
I'm gonna do it this time
I'm Rap Bear
My raps are mystical
Quantum physics!

Off-
Off the dome, here we go
Uh!
I'm-a started now
I'm-a battle now
We gonna make a rhyme,
So I can rap this time
I rap for mill-i-ons
Sesquipedalians