You can Ritual Summon this card with any “Nekroz” Ritual Spell Card. Must be Ritual Summoned, using only Ritual monsters, except "Nekroz of Hiro", and cannot be Special Summoned by other ways. You can only use each of these effects of “Nekroz of Hiro” once per turn. ● During either player’s Main Phase 1: You can discard both this card and 1 “Nekroz” Spell Card; target 1 Level 10 or lower “Nekroz” Ritual Monster, except “Nekroz of Hiro”, Ritual Summon that target, ignoring its Summoning conditions. If you activated this effect, you cannot Special Summon monsters for the rest of this turn. ● You can target 1 banished “Nekroz” monster, except "Nekroz of Hiro"; return it to your Graveyard, then, until your opponent’s End Phase, this card's name become that monster's name, and it gains that monster’s effects.