Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts. This requires not that the writer make all his sentences short, or that he avoid all detail and treat his subjects only in outline, but that every word tell.
Use the active voice. When you use the active voice, the subject of sentence performs the action instead of recieving it. Active phrasing lends your narrative an urgency and energy that can help keep your audience invested, no matter what you’re talking about.
Kill Nominalizations (-tions) and force the action of your sentence back into the verb. Nominalizations are nouns that contain a hidden action, and they can obscure your meaning.
Say NO to expletive constructions. ’It was’, ‘There are’, ‘There is’, no. Stop it. An expletive construction starts with an empty word. In an ExCon, the empty word isn’t acting as a pronoun - it has no antecedent. The little bastard has no meaning of its own; it’s a lazy stand in for the sentence’s implied subject. The empty subject is paired with some form of “to be” (is, was, et al.) to complete the ExCon. Don’t use it. Don’t.
Example ExCon: It was the last word of the spell that struck down her attacker.
Screw that: The last word of the spell struck down her attacker.
(NOTE: not all uses of “it is,” “it was,” “there is,” or “there are” are excons. If your pronoun has a real antecedent in the previous sentence, you’re golden.)
Prune wordy phrases and simplify your verbs. You wrote ‘this is why’ or ‘the reason for this is,’ you just mean because. You wrote ‘she is able to take out the assassins’ or ‘she has the ability to take down those bears,’ you mean: ‘she can take out those (bear) assassins.’ You wrote ‘She is aware of the accident,’ you mean ‘She knows about the accident.’
Your prepositionals are getting in the way. Prepositional phrases are perfectly fine in general, but too many of them (and a load of unnecessary ones) just make your sentences harder to understand. If you need to indicate possession, use apostrophe + s instead of bloated phrases. ‘The house of the Witch’ = ‘The Witch’s house.’