So basically this spell would be a great addition to COC and it would be apart of the dark spells. Its not over powered but i would help on a raid. Here is my discription.
Name: DETECTIVE SPELL
Cost: 15,000 DARK ELIXIR
Ability: IT WILL REVEAL ALL THE DEFENCES RADIUS CIRCLE. I find this very help ful cuz what if you want to put a troop down such as an air balloon but your not sure if itll get shoot at by an air defence you put down a detective spell an it will show you its radius.
Also some people just go for loot. If you put detective spell you will be able to see what mines and elixir collector is free from defences protection and then put a troop with wasting it meaning getting killed.
Radius: I think it should reveal the whole base.
Time: 20 min.