Big Grokko was the jailer assigned by Attuma to oversee the Valkyrie and Hawkeye who had been captured in battle with Attuma's hordes. He was harassing the Valkyrie when Hawkeye grabbed him from behind, allowing Valkyrie the opportunity to knock him out. The heroes then escaped from the jail and resumed their attack on Attuma's forces.[1]


Big Grokko possesses the standard powers and abilities of all Atlanteans.

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