4Clash Royale card guide
Goblin Cage is a defensive building that releases a strong Goblin Brawler when destroyed. Your opponent has to get through both the building and the fighter inside.
Place Goblin Cage in the middle of the lane against building-targeting cards (Hog Rider, Giant, Royal Giant). When the building falls, the Goblin Brawler keeps defending. Its two-stage design gives value for a long time.
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.