Comments of chapter undefined of Percy Jackson and The Next Incarnate

Are these types of spells all he can do with magic? I mean instead it being all he can do with magic, why can't you just let him use magic to manipulate the elements but those spells are the current skills/techniques he can use with the elements.

physical enhancement , mana arrow , mana beam,

use a spell to enchant an object to give it an ability of course you will not be able to create all powerful artifacts and will have some limitations

phantasmal killer from d&d it an illusion so real that if the target think it real it will kill him/her or you can go illusion route to get more versatil spells. some enchantement spell or rune spell could be good too .

Magic Eyes of Destruction Anos Voldigoad

One word..genjutsu, or better yet Illusions😊