Pedals that stack with the Black Arts Toneworks -Fnord

Electro-Harmonix Electric Mistress

Keep Black Arts Toneworks -Fnord's octave voice out front: Electro-Harmonix Electric Mistress goes after Black Arts Toneworks -Fnord in the signal chain so its lush voice doesn't muddy it

Fulltone OCD

What Fulltone OCD brings here leans toward full — that's worth building a pairing around

Electro-Harmonix Green Russian Big Muff

Electro-Harmonix Green Russian Big Muff pushes a high gain tone toward mid-forward

Meris Mercury7 Reverb

Meris Mercury7 Reverb's ambient voice goes after Black Arts Toneworks -Fnord in the signal chain — it's not there to compete with Black Arts Toneworks -Fnord's own octave character — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Fathom

Run Walrus Audio Fathom after Black Arts Toneworks -Fnord in the signal chain, clear of Black Arts Toneworks -Fnord's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Warm Audio Pedal 76 Compressor

Warm Audio Pedal 76 Compressor leans toward tight, and that's a real, usable character to pair with