If you control "King's Sarcophagus", you can Special Summon this card (from your GY). You can only Special Summon "Qebehsenuef, Protection of Horus" once per turn this way. If another card(s) you control leaves the field by an opponent's card effect, while this card is in your Monster Zone (except during the Damage Step): You can activate this effect; this turn, your opponent's monsters cannot target "Horus" monsters for attacks, also your opponent cannot target "Horus" monsters on the field with card effects. You can only use this effect of "Qebehsenuef, Protection of Horus" once per turn.