Dacha Tactics #89 - rarest of rare -- dark Dacha stairway to heaven!

I just came across this position and it is a beautiful one. The black king is a sitting dark duck on a1 but for now it seems mostly safe. Clearly the goal will be to lock up the black king with the knight, bishop – and hopefully the king. Let's open up our creative dacha juices and see what we can muster!

Interact with the puzzle below.  If you get stuck, you can always click the "lightbulb" icon in the lower-left of the puzzle frame.  Good luck!