Complex sentence: Fly experiences a nightmarish vision of an older version of himself waging war on countless worlds with such a wooden soldier army, whereupon he declares that the grove is to be left alone and that it be a place of quiet reflection and peace.
Split into simpler sentences: Fly experiences a nightmarish vision of an older version of himself waging war on countless worlds with such a wooden soldier army. This causes him to declare that the grove is to be left alone, and that it be no more than a place of quiet reflection and peace.