The spell of shattered sight when cast causes all of a defender's defenses to attack each other for a time. Please give me some ideas on how long it lasts at each level and cost. Available at TH 9. Also to prevent anyone from using just a bunch of these spells to win, only one is allowed to be used each attack.
Stats:
Lvl 1=1 seconds,cost 1,000 dark elixir
Lvl 2=2 seconds,cost 1,250 dark elixir
Lvl 3=3 seconds,cost 1,500 dark elixir
Lvl 4=4 seconds,cost 1,750 dark elixir
Lvl 5=5 seconds,cost 2,000 dark elixir





