a bit less cliche outcome coulda been he failed but set up conditions for the thing to get submerged in a muddy sinkhole/quicksand. effectively disabling it for a long long time letting the spirits deal with it at their leisure.Literally the power of friendship. Can't Jap authors be more creative?
More importantly he can't do that by himself. So he can't just fire it off as a convenient magic. It's good to give a skill too powerful some serious handicap or powers scalling goes out of whack.repercussions is a good sign of the author not taking one such skill lightly.