Yeah... Felix's hammer is absolutely [i][b]useless[/b][/i] in combat. He tries to smash out of his prison cell in the movie - and winds up [i][b]strengthening the prison window bars[/b][/i]. So him using it as the Hammer Mjolnir to inflict pain is going to backfire in a big way.

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He makes an excellent healer, though.

EDIT: Also forgot how [i]tiny[/i] the damn hammer is - its reach is horrible!