What do I do in this position? I'm the windmill.

You die since the king will kill you and bishops can't kill because it's a sin

Take the bishop.

Assume his post.

Spread the heresy that the White King is the Black Queen’s illegitimate love child.

Mill the wind, obviously

Subject yourself toward the Dutch king.

Bust out the nethertyphoon

Blow a mutha fucka.

You have to do something they don't expect from a windmill, harness the earth use a subterranean apc.

Rotate the 8 squares around you one space counter clockwise.

Roundhouse kick.

Mill some grains to flour and bring that flour to the queen so she can make some loafers

accept the peoples' grain. return the dust.