THOR is Fjord Fuzz's third ever circuit.   Daniel Thornhill designed it about 12 years ago when looking for a way to get a gated fuzz without loosing all the bass. He had a real hard time making it safe for work as it would make his ambient house lights flicker in time with his playing.  Daniel did eventually manage to tame it and what came out was this thing. It’s like a mk2 tonebender being eaten alive by an analogue sub synth bass. 
Depending on the knob position, you’ll have full minor scales playing automatically as your note envelope dies out, weird octave down artifacts, synthy textures and just a roaring fuzz. Stick another fuzz or overdrive in front of it to tame it for beautiful, singing yet broken lead tones or let it snarl and glitch back at you solo. 
The knobs are unlabeled. Top one sets the volume. The other two — well, you’ll figure it out eventually.