Send Lava Hound from behind your King Tower and add air cards behind it like Balloon, Minions, Mega Minion or Skeleton Dragons. While the Hound soaks damage, the cards behind it clear the defense. The Lava Pups it releases keep the pressure going.
Tips
Adding Balloon behind Lava Hound is a classic, very strong combination.
Plan to reset your opponent's Inferno Tower with Zap or Lightning.
Defend the ground with cheap cards like Guards or Tombstone and save your elixir for the air push.
Strengths
Defenses that can't hit air can't touch it.
Even after it dies, the Lava Pups keep up the pressure.
Weaknesses
Very low damage on its own; useless without support.
Inferno Tower and strong air defense can answer it.