See my blog post to learn more! But here’s the relevant end paragraphs:

Magic weapons have been nerfed. Instead of changing the fighter’s damage die, they gain a fighting bonus equal to their level minus how many powers they have. For example, a level-2 sword, using d4 and d6 for powers, has a 1-in-6 chance of having a +1 bonus.

This makes magic weapons with bonuses relatively rare, and not necessarily desirable over one with more special powers. This means you could have a level-5 sword with a +4 bonus, and not only is it going to just have one power, but it’s also going to be a mediocre one.

Fighters add their level to attack but not to damage. This means that fighters who want to sweep and slay need a magic weapon.

Still editing out the prev references to magic weapons’ damage dice.