Gravekeeper's Headman

[ Spellcaster / Effect ] If this card is Summoned: You can target 1 Level 4 "Gravekeeper's" monster in your GY; Special Summon it in Attack Position or face-down Defense Position. You can only use this effect of "Gravekeeper's Headman" once per turn. This effect is unaffected by "Necrovalley". ATK/ 500 DEF/ 1500