Dacha Tactics #71 - Dark splash!

A simple but elegant motif. We have an attack on the exposed black king. Upon inspection of colors, we are down an exchange but have a Golden dark bishop. So the dark squares should be the focus! E7 , g7, H8 , H4....all these are juicy and await our conquest. Somehow black's pieces control all these squares. But a little "splash" should do the job! Which piece can join in and upset black's attempt at dark resistance?

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!