This card is used to Ritual Summon "Herald of Perfection". You must also Tribute monsters whose total Levels equals exactly 6 from the field or your hand. When "Herald of Perfection" is Ritual Summoned by this card effect, you can remove from play this card in your Graveyard to select 1 of the monsters Tributed for that Ritual Summoned, and return it from your Graveyard to your hand.