3Clash Royale card guide
Skeleton Barrel is a barrel that flies toward buildings and drops skeletons when it pops. It's cheap pressure and bait.
Send Skeleton Barrel behind a tank or with cards like Goblin Gang to pressure your opponent's small spell. When the barrel pops, the skeletons damage the tower. Mega Knight decks use it often as support.
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.