Move Creation Workshop

[Omni]

I'd like to know if there is anything wrong with these. Regarding the kunai, is the damage description detailed enough? Are there enough restrictions, or are there too few?

I'd say you can seriously loosen up on the downsides. Third of the speed of a fastball seems weirdly slow for a thrown dagger. There are quite a few ninjas using kunais on the site, here's an example by Kakashi (who's a mod):

A steel dagger approximately the length of one's hand typically used for thrusting and stabbing. Kakashi favors these for their utility as well as the fact that they are disposable in combat. Though not designed for it, they can also be thrown with relatively decent accuracy to inflict puncture damage on a foe. As they are heavier and larger, they are somewhat slower and less accurate to throw than shuriken but have the capacity to deal more damage. Also owing to their larger size Kakashi cannot keep as many in his relatively minimal storage, only around a dozen or so after which he needs time to summon more if he cannot reclaim them from the environment.