Simply use a spell, cannon/bomb tower, or splash damage troop to counter them. I don’t recommend using them on offense, save them for stopping a tank quickly. Once they all lock on, the target will be gone quickly. To counter with arrows, just place arrows.
Which is the best legendary deck?
Deck Building. Lavaloon Miner Deck. Krux.
What is the best deck without Legendaries?
No Legendary Decks