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Grogg is a monster.
Grogg is a large green dragon, with torn wings, and a spiked tail.
- ↑ 1.0 1.1 "Marvel Universe: The Avengers: Earth's Mightiest Heroes #10". Todd DeZago & Clay McCleod Chapman (writers) & Christopher Jones & Luciano Vecchio (artists). "Marvel Universe: The Avengers: Earth's Mightiest Heroes (comic series)". January 9, 2013. No. 10.