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Citation de Hoshi Le [24/02/2015] à 15:37

When resolving this effect, even if 1 of the targeted cards is no longer banished, the other targeted card is still returned to the Graveyard and the "add 1 "Ritual Beast" card from your Deck to your hand." effect is applied normally. When resolving this effect, if both targets are no longer banished, the "add 1 "Ritual Beast" card from your Deck to your hand." effect is not applied.[2]

http://yugioh.wikia.com/wiki/Ritual_Beast_Ulti-Cannahawk

Must be Special Summoned (from your Extra Deck) by banishing the above cards you control, and cannot be Special Summoned by other ways. (You do not use "Polymerization".) Once per turn: You can target 2 of your banished "Ritual Beast" cards; return them to the Graveyard, and if you do, add 1 "Ritual Beast" card from your Deck to your hand. During either player's turn: You can return this card you control to the Extra Deck, then target 2 of your banished monsters (1 "Ritual Beast Tamer" monster and 1 "Spiritual Beast" monster); Special Summon them in Defense Position.

La partie en gras du texte de la carte est le coût pour son second effet.

Spoiler :

Voila