New Defensive Spell - Fog of War
This trap is meant to confuse the opponent and perhaps ward them off from attacking since they may have forgotten where crucial things were placed.
Dark elixir trap unlocked at town hall level 7. Once placed will form a fog of war patch within it's a range radius.
Town hall 7 unlocks 1, each subsequent TH level unlocks one more
Cost: 5,000 DE, lvl 2 10,000 DE, lvl 3 20,000 DE, lvl 4 40,000 DE
Size: one square
Range: lvl 1: 4, lvl 2: 5, lvl 3: 6, lvl 4: 7
Re-arm: Lvl 1 50 DE, Lvl 2 75 DE, lvl 3 100 DE, lvl 4 125 DE
When the opponent is scouting a base the fog of war is not present, once the opponent commences the attack then the traps activate and create black spots concealing the areas within it's range. Once the troop of an opponent walks within that trap's circle the fog is removed and will have to be re-armed for future use.
** based on the comments so far the costs have been reduced by half, and it should be clarified that this is in fact a trap, not a spell.