He went on to say this:Mike Mearls on Twitter wrote:Two critters for my campaign, creatures spawned by Torog. As written Torog is the god of the Underdark and torture in the Nentir Vale setting, I made him a fiend entombed underground by a curse. His frantic burrowing and malign nature created the Underdark.
...and this:Mike Mearls on Twitter wrote:Wrack spawn are what is left of humanoids that fall into into his clutches - skin flayed, limbs twisted and broken, turn their pain on others.
...and this:Mike Mearls on Twitter wrote:Lash fiends are lesser servitors, torturers who thrive on the wrack spawns’ pain. They drive them forward with cruel whips to seek out more victims for their master.
...and this:Mike Mearls on Twitter wrote:Here’s a nice piece of art for the wrack spawn
Mike Mearls on Twitter wrote:And here’s the lash fiend