Spring Trap - Clash of Clans Complete Guide to Defenses
As amusing as it is lethal, the Spring Trap will bounce up to 15 Army Camp housing slots' worth of troops (eg 10 Barbarians and 1 Giant) to their death.
Perfect for when hordes of Archers or Barbarians are on their way to pillage your Storage. They won't affect P.E.K.K.A.s, Heroes, or Golems, though, so keep that in mind.
Cost (Re-arm): 2,000 [Gold]
Damage Type: Single target
Targets: Ground
Range: 0.7 tile
Size Requirements: 1x1 tile
Number Available: 2 (Town Hall Level 4), 4 (Level 6), 6 (Level 8)