Uh... I’m gonna respectfully disagree here. Sure, everything will resemble something, but some magic systems can be pretty unique. Look at Brandon Sanderson’s Mistborn Series for example. The characters in that world ingest metals which they “burn” in their stomachs to gain odd powers, like the ability to push themselves off or pull themselves closer to metal objects. It’s wild and unlike anything I’ve read. Same author also wrote Warbreaker, in which “Breaths”, which are basically people’s souls, are combined with color to animate objects. Also wild and totally unique.
Brandon Sanderson is actually, in my opinion, the biggest name in writing magic systems out there and he does tons of lectures and writes books on how to do it. Just look him up online and you can find his “Laws of Magic”. I’ve seen tons of other writers and content creators reference him, so yeah, hope that helps.