A Fun Puzzle from Ken Regan

Here's a fun position from IM Ken Regan, complete with oversized diagram:

It's Black to move.* What's going on here? I'll parcel out some hints later, but first I'll present it as is, without any prompts or background information. Do your best, and for your own sake (both intellectually and aesthetically), please don't use your engines.

*Originally I mistyped "White" to move.