Thread:Lightning Laxus/@comment-24411065-20180530132444/@comment-24411065-20180530142126

It's not speculation. Garou gets visibly more powerful on page, Gyoro-Gyoro questions what is happening and we're given a flashback panel of Metal Bat while Garou even names the ability of 'Fighting Spirit' himself. I think that very strongly points toward Garou using Fighting Spirit. What would be the point in including it otherwise?

Even if Garou isn't 100% sure of it (because let's not forget, he thought it sounded ridiculous even when Metal Bat first mentioned it), it's pretty apparent what is happening here.

And you can't use the narration from the webcomic here because it hasn't happened in the manga yet. And it still wouldn't conflict with Garou having Fighting Spirit. I'm not saying "Garou gaining this ability means all future power-ups are related to it". I'm saying Garou has adopted this new ability into his existing skillset and it is assisting him in the fight.