Moses didn't send the plagues. God did. But I believe that the death of the first born would be the worst.
No they were all ten of them sent by god on the land of Egypt.
the bubonic plague
The worst complication is death.
In the final plaque the first born sons of every one who did not mark the door with blood would die.
So they did not get it
August
Moses brother Aaron spoke for him.
The curse of leprosy was not sent upon the wife of Moses. The curse was sent upon his sister, Miriam, when she and brother Aaron spoke against Moses and his wife.
Apollo
august
The worst plaque in Egypt was the slaying of the first born.
god