In this lesson, I commentate Keith Merrow's "Heart of the Sea Nymph," by request. This song's drumming goes through several different types of grooves, each functioning as almost archetypal examples of their respective styles and purposes. It presents a great opportunity for non-drummers to learn how to compose drum grooves in a progressive metal context. So, if you find yourself needing (or just wanting) to write drum grooves for your music, but don't feel that you quite know how, look no further than the following video. Enjoy!