What is the fine-grained topic of the following text: This time Mr. Nordvargr leaves behind the detailed abyssal land of haunting minimalistic atmospheres found on Vitagen, released under his full name - Henrik Nordvargr Björkk - and moves towards the blackest side of the drone doom micro cosmos. Only return the topic.
Henrik Nordvargr Björkk's shift from minimalistic atmospheres to drone doom music.