Silkstep
From Wildermyth Wiki
Silkstep is a Hunter ability that allows the Hunter to enter Grayplane.
In-Game Description
(Active) Hero makes an elusive move, slipping into grayplane. He/She is hidden to enemy units while in grayplane, able to move around and take advantage of surprise attacks.
Specifics
Silkstep moves the Hunter two squares in any direction (ignoring terrain), hides the hero, and ends the hero's turn after its use.
The Hunter cannot return to grayplane on the turn after being exposed.