God sent Moses to free his children from slavery in Egypt. He promised to do miraculous signs to show Pharaoh that he was God and that there was none like him. The first demonstration was to cast his staff onto the ground before Pharaoh. It immediately turned to a snake. But Pharaoh commanded his own magicians and sorcerers to do the same thing. And with their witchcraft and trickery they did. Moses’ snake, though, swallowed the others. This showed that God’s word overcomes the devil’s lies. This hardened Pharaoh’s heart. So God sent plagues.