SO MUCH TYPOLOGY in this lesson regarding the tenth plague on Egypt, which was the death of the firstborns not "covered" by the blood of the Passover lambs.  The tenth and final plague is the apex of Egypt's plagues, for it succeeded in compelling Pharaoh to let Israel go.

Who exactly was "the destroyer," who swept over Egypt, taking the firstborns without "the blood" of the Passover lamb on their doorposts?  You might be surprised!