Retribution/There can be only one

There can be only one
Game	Retribution
Description	Defeat your clones on wave 16 of the Bloodied Colosseum as the Chaos Sorcerer.

There can be only one is a Steam achievement in Retribution.

Getting it

Just beat wave 16 while playing the Sorcerer. Note that there is no clone wave on the Anvil of Khorne.

Special

Gaining this achievement unlocks the Cataclysmic Hellblade.