Defensive Spell Traps

Upgradable spell traps, which each level unlocks new ability, when arming the traps you select which type you would like.

Only two traps available. One unlocked at th8/9 then the second unlocked at the th above so either 9/10.

Examples

Lightning - shocks all enemy troops in area
Slowdown - slows down enemy troops in the area
Inferno - blazing fire burns enemy troops.
Rage - increases damage dealt of all defenses including building cc and hero's within area.

This would be an awesome addition....in my opinion