Guns: The Evolution of Firearms (2013)

S1E13 Night of the Shadow Beasts

Beast Man presents Skeletor with the Shadowbeasts, formidable creatures that launch their assaults under the cover of darkness. Aware that these beasts are repelled by light, Skeletor and the Evil Warriors set off an explosion at Mount Barathrum, creating a massive dark cloud that shrouds the sun. As the chaos unfolds, Ram Man confronts his deepest fears when Teela is hurt during the onslaught. The heroes soon discover that the Shadowbeasts are targeting both the Royal Palace and Castle Grayskull!