I love how Discworld introduces Granny Weatherwax.
She is introduced as a witch, but it's not actually clear if she can do any magic for quite some time. At first all she does is herbal medicine and Headology, aka make-believe, mind tricks, placebos and basically tricking people.
Even when it becomes clear that she flies around on a broomstick and can project her mind into other living things, it's still not obvious if she can do any magic beyond that.
And then she and her buddies magically move an entire country 15 years into the future, and it becomes very clear that she's not only very much capable of doing magic, but she's one of the strongest, if not the strongest magic user in the entire world who can do stuff like summon death himself with nothing but a candle, and I am not even sure she really needs the candle.
Compare that to the wizards. The first impression you get of them is that they're powerful magic users, I mean they are wizards in a fantasy world, people fear them for their magic, and they got a whole magic college, so they must be powerful, right? They even look down on witches because they "don't use real magic"... and because they're usually women.
Granted, the very first (and best) wizzard we're introduced to can't even do any magic, but he seems like an outlier. Then you hear more and more about the magic college and other wizards, and it becomes clear that most wizards are arrogant and lazy fucks who can't do much magic beyond basic fireballs, turning people into frogs and maybe teleportation. Even the head-wizard of the college was completely helpless after running out of juice from a single teleportation spell.
Even when all the wizards become incredibly powerful, thanks to circumstances beyond their control, all they use their magic for is building really tall wizard towers and raging wars against each other. Wars which are ripping holes into reality, which threaten to release unspeakable horrors from the unspeakable horrors dimension.
Like... the books used most reader's assumptions and expectations, aka 'Headology', to make them underestimate Granny Weatherwax while overestimating the Wizards.
Just *chef's kiss* world building.