Greld

The Greld were a insectoid race of arms dealers. They had six legs and two pairs of crab-like claws, mottled dark red shells, four stalked eyes, and leathery wings.

Millions of years ago, the Greld participated in the Millennium War. (PDA: The Quantum Archangel)

In 1587, the Greld attacked the Roanoke colony, implanting mind-control devices and components of a meta-cobalt bomb in the colonists.

In 1609, the Greld used their mind-controlled humans in an attempt to destroy the Armageddon Convention, but were defeated by the Doctor. (MA: The Empire of Glass)

Some time before 2975, the Earth Empire destroyed the Greld homeworld, which became the prison planet Dis. (NA: Original Sin)