In Clash Royale, a double evolution deck is a deck that includes two cards that can be evolved into more powerful versions. This can be a powerful strategy, as it can allow players to quickly gain an advantage over their opponents. There are many different double evolution decks that can be used, but some of the most popular include the Miner/Minion Horde deck, the Giant/Double Prince deck, and the Hog Rider/Goblin Barrel deck.
Double evolution decks can be very effective in Clash Royale, as they can provide players with a significant advantage over their opponents. However, it is important to note that these decks can also be difficult to play, as they require a lot of skill and timing. If you are new to Clash Royale, it is recommended that you start with a simpler deck before trying to use a double evolution deck.