Just south of the city Solitude, in Western Skyrim, you will find the Black Morass Ritual Site. A Harrowstorm will form there comprised of harrowfiend (Vampires that have gone feral) and minibosses. Here are some screenshots of the chaos 🙂
The character you will see here is my main toon named Survonna. Survonna is a Wood Elf Warden and has a bear that fights by her side. She is a stamina base Warden and I love playing her. Her main weapon is a bow, but she has a two-handed axe as back up.