@Baysiri
First of all of course it’s dues ex machina I never said otherwise.
I’m saying this manga explains it, as in this power doesn’t come from nowhere and this isn’t the first time it happened.
Don’t expect good battles from every manga. It’s hard to make them. You say it like it’s obvious but how else are you going to make your mc win against a powerful opponent with out mc being ridiculously over powered. (Plus there’s the fact that even mangas with good battles use this(ever heard of sao? The last battle of aincrad used this and I really enjoyed that battle))
It even mentioned that he felt the same tingling as when he unlocked his claws.
Don’t be a critic without knowing how difficult this stuff is. Or at least be nicer about it( in fact just be nicer about it leave the hard stuff to the professionals)
Edit: I’m tired and just want to sleep so please don’t respond with an argument I feel entitled to argue back with( yes I know I’m stubborn)