Complex sentence: Investigating inside the cottage, Max lights the Black Flame Candle, that resurrects the witches who plot to continue their plan to suck out the souls of all of Salem's children, beginning with Dani.
Split into simpler sentences: Investigating inside the cottage, Max lights the Black Flame Candle. This resurrects the witches, who plot to continue their plan to suck out the souls of all of Salem's children, beginning with Dani.