Hmmm. Not a fan of how the artist is using the sword. His strategy should basically always be overhead slashes, cause anything else he won't be using his magic or the weight of the blade optimally. It's not like he actually buffs his strength after all. Yet, at least.
Edit: Another valid strategy would be turning himself into a weight holding the blade point first out for something to run into, but I feel like that's one that would also require strength buffing somehow.
Imo he's got everything backwards. Putting aside the logical leaps we gotta go through to go from slowness to gravity and ice to dropping temp, he should probably be using a lighter blade that he can weigh down instead of a larger one that he'd need to lighten constantly since that should take MP or whatever it is. Since he CAN keep it up at all times, tho, why not opt for heavy armour like the Earth guy? He'd be able to move faster and tank better hits. There's no reason not to.
We've seen him throw a "weighted punch" which realistically shouldn't work as gravity ≠ force. He'd have force manipulation magic isntead of gravity atp. But it's magic so what could be realistic anyways. The issue then, however, is why is he not doing that at all times? Switch between lightening/weight for speed of execution and strength of blows. This isn't even some awesome new idea. I'm pretty sure I've seen this from that one yandere sister isekai (which did the whole weightless magic better, imo, even if apparently later on the story goes even more batshit insane).
Overall this story is kinda weird for me. It SOMETIMES will have a panel or two of pretty neat art, but the rest of it is generally clunky feeling with characters in poses that are awkward or not really dynamic. The story beats are slow at times but then just speed dramatically up otherwise; we're in one place then at another soon after without really exploring anything in depth. Granted it's a generic isekai setting, I'd still at least like to KNOW what the world is like to some degree. The logic within the story and of the author is probably the worst crime, though. From the dumbass dungeon party system (which I wouldn't have even QUESTIONED if they didn't mention) to how apparently no one has figured out how to use slowness magic other than the MC (common trope) to the generic "Oh he beat the bully who tried something dirty! Oh he's too strong! We're afraid of you for standing your ground!" bullshit so common to isekais and slop manga as a whole. This manga feels like someone's first work. Which isn't necessarily bad, but it's certainly incredibly unpolished.
there was no reason for me to go on for so long bruh i was on some demon time