The "haunting" riff in the Hounds song features a tritone, and it's a modal-ish progression - perhaps with hints of folk music lurking in the background. You'r

The "haunting" riff in the Hounds song features a tritone, and it's a modal-ish progression - perhaps with hints of folk music lurking in the background. You're not going to understand it by counting chords. A lot of pop has these quirks. Even things that sound like I-IV-V or I-V-vi-IV bubble gum. Slapping labels on the most obvious chords in a naive way misses them completely.