Duamutef, Blessing of Horus Prismatic Secret Rare

If you control "King's Sarcophagus", you can Special Summon this card (from your GY). You can only Special Summon "Duamutef, Blessing of Horus" once per turn this way. Gains 1200 ATK/DEF for each "Horus" monster you control. 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 draw cards equal to the number of monsters with different names in your Main Monster Zone. You can only use this effect of "Duamutef, Blessing of Horus" once per turn.