Aside from the ones that it was using to keep itself standing, the rest of the Horror's tendrils stretched at Leo without holding anything back!
Having learned from the first time, the monstrosity was no longer stupid enough to target one spot, it spread its tendrils to cover as much as it could of Leo's surroundings.
'As I thought, it's not going to be that easy.'
As much as this seemed to be a very generic boss fight, just evading patterned attacks and dealing damage wasn't something that can be duplicated in reality.
Of course, considering Leo's vast array of abilities, he didn't have to use the regular pattern either.
Swish!
Instead of just exhausting his Enigma to use Shadow Movement infinitely, Leo recreated the Sword Breaker before he started slashing away at any tendril that came close to him.