The concept of Heaven has been romanticized by humanity over the ages, yet prior to Diablo's final assault on the realm, no mortal had ever set foot in the realm. But through observation, both direct and indirect, Heaven is a realm of clouds and light that seems to enjoy a perpetual dawn, stretching into infinity. However, despite these clouds, it never rains. Heaven is a hostile environment for humans—the air is cold and devoid of moisture, which rapidly leads to dehydration. The amount of light can cause irritation to the eyes.