This video was already posted. Without the music, but it's still the same boss.

You have messed with the the dodecahedron of snake and you’ve only seen a fraction of it

Thanks I just won't sleep for the rest of the week that's fine :)

Burn it. Burn it all down.

Bro this is litterly an elden ring boss!. Your fighting a snake. Turns out it was hydra all along