This is the kind of thing that could see play in a Legacy Elves deck
A card is considered functionally identical to another card if it has the same card type, subtypes, abilities, mana cost, power, and toughness
Hes never promoted to another duelist hall (unlike Jaden, who seems to turn them down), and we literally never see him win a duel
Swords to Plowshares on a 3/2 with flash and lifelink is a very powerful effect at face value
They're not skipped until they would begin, so if Trouble in Pairs leaves the battlefield before that happens, the extra turns will be unaffected
This is a monumental addition to whites toolbox, and it allows non-black W/x decks a mass reanimate