He will be able to move underground, below the board the game is usually played on. While underground, he will be unseen to the enemy. He will be able to attack enemy minion by moving directly onto the tile they are on, upon which he will deal his attack damage to the minion without taking any damage back (it’s a surprise attack after all) and become visible to the enemy, appearing on a random space nearby the attacked minion.
As for how the concept will be presented, for the player controlling the minion, he will look just like a normal one, just semi transparent, until he attacks and become normal looking again. Upon entering the game he will go underground and the tile where he went in will be clear to the enemy so it’s possible to play around it by anticipating it’s movement to some degree.



