3Clash Royale card guide
Firecracker is a cheap long-range troop whose fireworks burst and spread behind her target. She hits air and ground and is effective against swarms.
Place Firecracker behind your tower to hit support troops and swarms from range. She recoils backward after every shot, which keeps her out of danger. Fast cycle and control decks use her often.
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.