Comments of chapter undefined of Online In Another World

I mean, it seems like you're ignoring context here. In general, not 'holding back' is extremely dangerous for Emilio because of the destructive nature of his higher-end spell. A lot of the time, he tries to use minimal force as not to expend more mana than needed. Honestly, I'm pretty certain a majority of his big fights state or either imply he can't use his full arsenal out of fear of collapsing the environment around him.