Pedals that stack with the Mr Black Mr. Black SludgeMaster

Walrus Audio Ages

Put Walrus Audio Ages in front and the fuzzy tone leans further toward clean boost

Caroline Guitar Company Somersault

Keep Mr Black Mr. Black SludgeMaster's full voice out front: Caroline Guitar Company Somersault goes after Mr Black Mr. Black SludgeMaster in the signal chain so its modulated voice doesn't muddy it

JHS Colour Box V2

JHS Colour Box V2 layers clean boost onto an already fuzzy signal

Strymon OB.1 Bass

What Strymon OB.1 Bass brings here leans toward clean boost — that's worth building a pairing around

Cusack Music Delay TME

Cusack Music Delay TME's tight voice goes after Mr Black Mr. Black SludgeMaster in the signal chain — it's not there to compete with Mr Black Mr. Black SludgeMaster's own full character — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1

Run Walrus Audio Mako D1 High-Fidelity Stereo Delay V1 after Mr Black Mr. Black SludgeMaster in the signal chain, clear of Mr Black Mr. Black SludgeMaster's own gain stage — goes in the amp's FX loop (or last, into a clean amp)