Jean ripping, fart snarling hell fuzz. Sounds like an AC30 dropped down a flight of stairs and chewed by a bear. While it's a totally original design the Mercy comes from the same school of synth-like annihilation as Dwarfcraft and Devi Ever pedals.
As well as sounding like a torn speaker the Mercy is a multi FX of sorts, you can get soft and compressed attack, tremulous decay, octaving and bit crushed sounds out of this beast.
Clears a practice room in seconds, why sound nice when you can sound different?