Complex sentence: Before long Elvira discovers her great-uncle Vincent is dead set on getting the recipe book and is willing to do whatever it takes to get it, even if it means convincing the townsfolk to brand Elvira as a witch and burn her at the stake.
Split into simpler sentences: Before long Elvira discovers her great-uncle Vincent is dead set on getting the recipe book and is willing to do whatever it takes to get it. Even if it means convincing the townsfolk to brand Elvira as a witch and burn her at the stake.