3Clash Royale card guide
Tombstone is a cheap building that spawns skeletons at regular intervals. It releases a few more skeletons when destroyed.
Place Tombstone in the middle of the lane against building-targeting cards (Hog Rider, Giant, Balloon) and single-target troops. The skeletons distract them. In Lava Hound decks it handles ground defense cheaply.
Cards that deal with it efficiently:

This card has a hero form. The hero is active in your deck’s 2nd (Hero) or 3rd (Wild) slot. The Hero slot unlocks at Arena 5.
ElixirDeck automatically takes your unlocked evolutions and heroes into account: build your decks.