During a deck check in Round 15 at Mythic Championship II, the judge staff noticed an issue with Yuuya Watanabe's deck where the sleeves of his Urza's Power Plants were marked in a specific way. Three Urza's Mines and one Urza's Tower had a different marking, and three Urza's Towers and one Urza's Mine also had a different marking. No other cards in the deck nor sideboard had any of these marks. T