originalskaiil asked: The reason you made prowess a blue evergreen keyword is that blue gets the most noncreature spells, and caring about them is blue's identity. If you haven't been using prowess in sets because you're making blue creature centric, or giving it a theme that doesn't work with prowess, that doesn't seem like a sign that prowess isn't working but rather that you aren't giving blue the identity it's supposed to have.

You’re misunderstanding the problem. Prowess isn’t always playing nicely with other mechanics or themes in the sets.