Strongest Overlord is a Weiß Schwarz card from Disgaea DG/EN-S03-E037. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Choose a climax in your opponent's waiting room, and return it to your opponent's deck. If you do, shuffle your opponent's deck, choose one of your opponent's level 2 or lower characters, and put it into his or her stock.