Generate a coloring book page for adults with a distinct Chibi art style. Craft an outline-only image featuring a Viking character taking a stroll through a serene forest. Employ thick lines to define the Viking's form and the surrounding elements. The image should be rendered in black and white to provide a classic coloring page feel. The Viking, portrayed in a cute and exaggerated manner typical of Chibi art, is shown in mid-stride with a determined expression, wearing a horned helmet, shield, and carrying a small axe. The forest consists of towering trees with intricate bark textures, and there are hints of distant mountains rising in the background. The outline should encompass intricate details of the Viking's attire, the forest flora, and the overall whimsical Chibi style, offering colorists an engaging and intricate scene to color.