The King of the Ring is an automatic mode that rewards you with extra cards. Because the PvP matching is based on the strength of your deck, start with the worst possible deck to intentionally reduce your strength. As soon as the tournament starts, swap the cards with your best ones to have the best chance of winning. To win King of the Ring easily, start when you have at least 4 energy. Start strong to get an early lead. Save boosters for later stages. The qualifying rounds should be easy enough to win without them. Qualify each time to get a top card. Be active during a championship and log in often to restore your wrestlers' stamina or revise the lineup. You can still train your wrestlers and increase their stats after the championship starts. Keep cards available to train your stable. Try to have ten decent wrestlers to have the option to switch them around.