5Clash Royale card guide
Executioner throws an axe that flies out and back like a boomerang, dealing splash damage along a line. He hits air and ground and is very effective against swarms.
Use Executioner next to your tower against swarms like Minion Horde, Bats and Goblin Gang. Grouping troops with Tornado so his axe hits them all is a classic combo. On offense he supports from behind a tank.
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.