5Clash Royale card guide
Electro Dragon is a flying troop whose lightning chains between several targets and stuns everything it hits. It's effective against charging cards.
Use Electro Dragon against Inferno Tower, Inferno Dragon and Sparky; its chain lightning resets them. In Elixir Golem and Golem decks it breaks up the defense from behind the tank. Its chain attack also helps against swarms.
Cards that deal with it efficiently:

This card has an evolution. The evolution is active in your deck’s 1st (Evolution) or 3rd (Wild) slot. The Evolution slot unlocks at Arena 3, the Wild slot at Arena 10.
ElixirDeck automatically takes your unlocked evolutions and heroes into account: build your decks.