The Marro have been called to Valhalla to carry out Utgar's demands at all costs. However, hidden deep within the uncharted jungle, a lethal Marro hive is breeding venomous predators!

Will the world's Heroes be able to battle through the dark and murky jungle to defeat these savage creatures? Or will the Marro follow through with their mission to contaminate the world? The answers lie within the game of Heroscape.