Hello I have a great idea.
Barb wire
okay so it is used as a defense (like a wall). Troops dont have to break it like a wall but just go through it but they do take damage however there is a certain durabilty to the barbwire too (this is how much damage is delt before it breaks).
it can be upgraded like a trap bomb. Here are the effects for each level.
Needs to be rearmed cost is a ratio of gold to % durability done on it (100 gold per 1 durablity done to it)
Level 1 unlocked at th 7
10 peices of barb wire ( light gray in colour)
Cost: 5000gold
Damage per sec :15
Durability 150
Upgrade cost is 150 000 gold
Level 2 th 8
15 pieces of barb wire (dark gray in colour)
Damage per sec: 19
Durability: 250
Upgrade is 500 000
Level 3 th 9
20 pieces of barb wire (black with golden tips)
Damage per second: 23
Durablilty:300
Upgrade 1 000 000
Level 4 th 10
30 pieces of barb wire ( red with flaming orange and yellow tips)
Damage per sec 30.
durability: 500
Leave a comment on how the prices and damage ratio is good. I hope someday this might get put in the game :). Thanks for reading this post.

