Complex sentence: Fortunately, Hermey and Yukon arrive, and hatch a rescue plan-luring the monster out of the cave, Yukon knocks the Bumble unconscious with a boulder so Hermey can extract his teeth.
Split into simpler sentences: Fortunately, Hermey and Yukon arrive, and hatch a rescue plan. Luring the monster out of the cave, the pair knock the Bumble unconscious with a boulder and extract his teeth.