magic does not need to be plural (magics)
part(s) should be plural here, since it potentially applys to many places in your code
Changed 'Them you can inherit -> Those you can inherit'
While it is fairly clear what 'that' refers to here, since you are staring a new paragraph, it doesn't hurt to explicitly state what 'that' is again.  Especially since the little aside about 'Cripped D' sort of takes the readers mind off the topic at hand for a moment.
Again, just a minor change to improve the flow of the sentence.
I don't know markdown, but I think the {.d} bit was missing here.