If you control "Thousand-Eyes Idol," you can use one of the following effects once per turn:
● Return 1 card from your hand to the Deck, and Set 1 "Black Illusion Ritual" or 1 "Polymerization" to the field from the Deck. (Only 1 copy of cards with the same name can be Set during the Duel with this Skill.) Then, you can add 1 "Relinquished" to your hand from the Deck. ● Return 1 monster from your hand or the field to the Deck, and then play 1 "Bickuribox" from the Extra Deck.
This Skill can only be used if you begin the Duel with a Deck (excluding Extra Deck) that contains no monsters other than total of at least 10 Level 1 Spellcaster-Type monsters or monsters with "Relinquished" in their text