Death of the First Born
This final plague attacks Pharaoh directly. He is the ultimate power over Egypt and now God defies him as He has the other deities of Egypt. Unlike the other plagues the Israelites will not escape it based solely on their identity. They must sacrifice a lamb and be saved by its blood which is smeared around the doorways of their homes. The lamb must also be eaten which represents communion when the body the sacrificial lamb (Jesus) is consumed as we are saved with His blood. As the firstborn of Egypt are killed for their transgression the firstborn of God will also be killed for the transgressions of all who accept His sacrifice by believing in Him. This is the act that finally sets the Israelites free from bondage.