Once per turn (Quick Effect): You can look at all Set cards your opponent controls, and if you do, banish them face-down
While 40 is still a high number of cards, it makes it a lot easier to draw a card that the player wants than if they had the max of 60 cards
Blue decks that could certainly play prolonged, traditional control games, but could also just auto-win on Turn 5 by playing a powerful, hard-to-interact with creature that can block until it abruptly turns the corner with protection up
Everything else is very light played to NM
Guan Yu's 1,000-Li March Rarity: Rare TYPE: Sorcery SUBTYPE: - CMC: 6 Mana cost: USD: $53.96 EUR: 26.97 TIX: 0.00 EDHREC RANK: 28340 Destroy all tapped creatures
Drawing cards is powerful in Yu-Gi-Oh