This card can be used to Ritual Summon any 'Nekroz' Ritual Monster from your hand or Graveyard. You must also Tribute monsters from your hand or field whose total Levels equal the Level of that Ritual Monster. You can only use this effect of 'Nekroz Illusion' once per turn. If you control no monsters: You can banish both this card and 1 'Nekroz' monster from your Graveyard; add 1 'Nekroz' Spell Card from your Deck to your hand.