It wasn't an angel, it was HaShem.
Plague Angel was created in 2004-11.
The plague that killed Egypt's firstborn was the tenth and final plague in the biblical story of Exodus. It was known as the plague of the death of the firstborn, where all firstborn children in Egypt, including animals, were said to have died. This event ultimately compelled Pharaoh to release the Israelites from slavery.
The tenth plague was the death of the firstborn, where God struck down all the firstborn in Egypt, from the firstborn of Pharaoh to the firstborn of the prisoner in the dungeon and even the firstborn of all the livestock. This plague finally convinced Pharaoh to let the Israelites leave Egypt.
The plague of blood in the Bible lasted for seven days, during which time the water in Egypt turned to blood making it undrinkable. This was the first of the ten plagues brought upon Egypt by Moses.
The Plague of darkness. From Exodus 10:21-23
In the time of Moses (prior to the Exodus,) the final plague imposed by G*d on Pharaoh and Egypt was the killing of the first born. It is sometimes called the passing of the Angel of Death.The Hebrew people painted sheep's blood on their door frames as a sign that the Angel should 'pass over' this house.It is remembered at the Passover.
No they were all ten of them sent by god on the land of Egypt.
If this is in regard to the last plague God would visit upon the Pharoh and Egypt, to kill Egypt's firstborn, then let us visit Exodus 12. God tells Moses to protect their firstborn to slaughter a lamb, and using hyssop to paint the top plate and sides of their doors with the blood so that the Angel of Death, in legend that was the angel Samael, will "Passover" the Hebrew people's homes without consequence. Thus, the Hebrew's first born were spared.
The second plague to hit Egypt was Frogs. The Hebrew word is Tz'fardaya.
Passover - a feast to this day.
The last plague was when God smote the Egyptian firstborn.
The last plague, involving the death of the firstborn of all the Egyptians, including Pharaoh's, precipitated the Exodus. The Egyptians sent them out in haste saying 'we be all dead men.' God had sent his 'death angel' throughout Egypt and the Egyptians, who were not 'covered by the blood of the lamb' suffered the consequences, of course brought upon them by the intransigence of their Pharaoh. The Israelites then left in what is usually referred to as the Exodus.