Grey Gargoyle

Grey Gargoyle is a supervillain who can turn people into stone.

The Avengers: Earth's Mightiest Heroes
Grey Gargoyle first appears as a prisoner in the Big House, warning Whirlwind about not try to escape.

He's among the inmates who escape when the Big House malfunctions and uses his powers to turn a S.H.I.E.L.D. agent into stone.

Grey Gargoyle would later re-appear as a member of the Masters of Evil. He turns Karnilla into stone to help Enchantress and Executioner to steal the Norn Stones. When he asks for his reward, Executioner approaches him, axe in hand. He is apparently killed.

(This article is taken from http://marvelanimated.wikia.com/wiki/Grey_Gargoyle_(Yost_Universe) by D.A.Martin and ARTaylor)