Grimalda
You must turn exactly 3 Piles in your YARD from their GRASS sides to their DIRT sides in order to sway this.
If you don’t have 3 GRASS in your YARD, you cannot sway this.
Any cards on a Pile remain there when that Pile turns from GRASS to DIRT (and vice versa).
When scoring, this is worth 5 VP if it's in your Sway.