Awespec
So he is essentially adding more properties to all of his magic on top of increasing his affinities to star, light, and fire force. . I wonder what he will choose to add after tier 4. The author does love giving his MC's lightning and wind so I imagine that they will be added somehow. Maybe with a lightning aligned ore he could make all of his attacks have a higher spread and be able to chain through enemies. Maybe a wind aligned ore could increase the raw power of all of his solid projectile magic attacks. Furthermore, at the end of the day in a universe where artifacts are mostly metal, having a metal affinity can be insanely OP. Especially if one day Leonel is able to control metal similar to somebody like Magneto because at that point any metal on you or in you becomes a weapon that Leonel can exploit. Obviously this wont happen for thousands of chapters but I hope it does eventually happen.