Lord of Dust

The Lord of Dust is a create created from medical nanomachines that ravaged the world, and used wormholes to go back in time and start the process is assimilating and devouring the world over, repeating the process again and again, becoming more powerful each time. Goodluck sends the Captain to Dite to kill the Lord of Dust.

The Captain does succeed in shooting the Lord of Dust with Metal Gear Sahelanthropus' Rail gun. However, it only reassembled itself as it had no concept of death. Virgil AT-9 sacrificed itself to introduce the concept of death to the Lord of Dust, and the Captain fired at it again with the rail gun, killing it.

Behind the scenes
The Lord of Dust is the final boss of Metal Gear Survive''. ''It is the only boss aside from Seth.