The power system doesn't make any sense to begin with. It's a "banished from..."-style story, but the MC is cast out while being extremely powerful and proficient from the start, right into a place where he is even stronger.Thank you for the translation.
This manga started off with everyone being extremely overpowered, so it becomes hard to create a story line with weak enemies. Our MC could have dealt with everything in this chapter by using his sand power creatively, but to illustrate some kind of power levelling he just does not know the full extent of what his power can do, and... it has been done better.