There are decks, like mono-blue trying to win with just Paradoxical Outcome and Aetherflux Reservoir, or my old Song of Creation attempt, that used these cheap artifacts and missed the consistency requirement
Unless there's too many cards in the GY, Exchange of the Spirit is a lot better being in the GY instead
Advanced Search Sets Random Syntax Showing 1-5 of 5 cards: "set name: FIN, supertype: Legendary, colors: equals W_G" Display: Card Small Sorted By: Card Name Ascending Showing 1-5 of 5 cards: "set name: FIN, supertype: Legendary, colors: equals W_G" Crystallized Serah Garnet, Princess of Alexandria Rinoa Heartilly Serah Farron Yuna, Hope of Spira Advanced Search English
In the right conditions, you can do a ton of damage each turn, up to 280, as you can have up to four copies of Ethans Adventure in your deck
Meanwhile, while Reiji and Leo have very different goals, both use questionable methods, believing the ends justify the means