Which effects pedal are you using with your MPC One+?

I'm thinking about getting an effects pedal to add some variety to my sound. I'd be using an Arturia KeyLab Essential mk3 as a MIDI controller to plug into the pedal and then sample the results with my One+.

I know the answer depends on the type of music I'd make, but I'd like to hear which pedal you use and for what kind of music. Thanks!