However, you could consider "-ian" a suffix in this case, as it's the part of the word that indicates someone who practices or is skilled in something.
Here's why "-ian" isn't considered a standalone suffix in this case:
* Not a stand-alone suffix: "-ian" doesn't typically attach to any word to create a new noun.
* Part of the root: "-ian" is integrated into the root word "magic" to form the noun "magician."
So, while you could argue "-ian" is a suffix in this instance, it's not considered a separate, independent suffix in the English language.