When this card is activated: You can add 1 "Winter Raven" monster from your Deck to your hand. "Winter Raven" Monster Cards you control cannot be destroyed by card effects. During your End Phase: You can Set 1 "Winter Raven" Trap from your Deck or GY. You can only use this effect of "Deep Forest of the Winter Raven" once per turn. You can only activate 1 "Deep Forest of the Winter Raven" per turn.