Here is a reverb that increases reverb, and adds in 2 pitch shifters with a momentary latch. They rise and fall with the help of a slew limiter. You can adjust the rise and fall time with that. It is set at one and 2 octaves above. Feel free to play around with those, and get some interesting sounds.

L mono in→ Stereo Out
↓↓↓↓
↓↓↓Ghostverb→ Stereo Out/ VCA1
↓↓Pitch shift 1→ VCA2→ VCA1
↓Pitch shift 2→ VCA3→ VCA1
reverb lite→ VCA1

VCA1 is controlled by a slew limiter (will control the rise and fall)

VCA1 is activated by left footswitch

VCA2 and VCA3 will control that amount of the pitch that you want to come through.