Helpoemer (PGD-058) - Pharaonic Guardian Unlimited

When this card has been sent to the Graveyard as a result of battle, this card''s effect is activated. As long as this card exists in the Graveyard, your opponent discards 1 card randomly from his/her hand at the end of his/her Battle Phase. Neither player can Special Summon this card from the Graveyard.