Pokemon starter decks, like the My First Battle Pikachu and Bulbasaur, are simplified 40-60 card sets with basics for learning rulesuse them as templates, adding from boosters for personalization
First up, at the cost of discarding another card, you can tutor any creature when Formidable Speaker enters the battlefield
Whats worse is that Sin cannot be permanently killed, as a summoner needs to sacrifice themselves to create the Final Aeon, a being that can temporarily slay Sin for a few years, before it returns once more
If another object becomes a copy of a face-down creature or if a token is created that's a copy of a face-down creature, that new object is a 2/2 colorless face-up creature with no abilities
Instead of challenging characters, you just need to have them damaged for Robin Hood to quest for large amounts of lore