Complex sentence: For a school of its size that is simply unprecedented and unthinkable at the level of talent of play for a school of their size, and are a force to be reckoned with as they grow stronger every year.
Split into simpler sentences: For a school of its size that is simply unprecedented and unthinkable at the level of talent of play for a school of their size. And are a force to be reckoned with as they grow stronger every year.