i agree with the ones saying mc is testing the other magic walker. They are trying to see if they are an otherworlder too, and I believe that maybe mc is acting a bit tougher thant they are, probably will open up about it later, like acting though for their own troops too.
@Goldenzeal yeah, changed the battlefield or removed the buff thing. It will get an explanation in the next chapter for sure, rules are a important part of this manga till this point so i have faith in the author that they will clarify this.
But its fun to speculate. If the main heroes are...
gracias por el capitulo! me pregunto si será un cliffhanger bait y dirá luego "pero también quiero salir con él" y tendremos un final harem o indeciso o en verdad la eleigió a ella.... no puedo esperar!