While I don’t think Superman is “boring” as many people enjoy to say, I don’t like Kryptonite, while yes he is weakened by other things such as magic(If I remember correctly), I guess I just prefer low level powers, is what I’m trying to say. In novels, people like Alex Verus, Ray Lilly, people with a single or a few, defined abilities, whether or not the antagonists have powers or not(I think in those the antagonists are magical.) ?I do enjoy a good, big screen Superman vs. Zod, titan vs. titan battle, but mostly I like low levels. Though I do particularly like Harry Dresden and Isaac Vainio, even though they are quite powerful, have ?a wide range of abilities, and are constantly evolving. ?Either way, whether the antagonist has powers or not, they can be a compelling villain.

But anyway,??onto the logline.
Example:?When her father is killed and his throne taken, a young princess must learn magic from her exiled mother to stop the false king from possessing her and take her rightful throne.?(~31 words)
Since it is labelled adventure, it is my opinion that the original post does not give much indication of that, but Nir Shelter’s does.

Regardless if the villain has powers or not, I strongly urge that you find a good motivation, and a clear goal, that is something other than world domination or some variation. In other words, think about making it personal. The villain wants?her specifically. As in, he doesn’t even want her in order to achieve his bigger goal, she is the goal. Whether it’s jealously, revenge,(as in, possibly the mother scorned the new king and now he wishes to take her), or something like the old king stole the new king’s daughter(the princess) and now he wants her to know the truth. (that doesn’t really work with the plot you’ve given, at least to me it wouldn’t make much sense to kill the king in order to achieve it), or even he just wants her to be his apprentice. Basically, don’t just make the villain “evil”, make him relatable, give him a good reason for doing what he’s doing.
Hope this helps.