Up for sale is this used Synth Engine pedal from Electro-Harmonix. This is a unique pedal with freeze features and pitch layering. Here’s what EHX has to say about the Superego

The polyphonic EHX Superego Synth Engine reinvents sample and hold, performs fluid glissandos and creates oscillator like, synthesizer effects. It can stack sounds or create infinite sustain, it even lets you tweak attack and decay, or use its effects loop to invent novel synth patches. Indulge your guilty pleasures!