i think it would be a good idea to have a glue trap, much like the bomb it would be hidden to attackers but when a troop came into it's range it would stick the troops within it's range immobilizing them for about 5 seconds. whilst in this time the troops cannot attack you, also troops would not be able to be diploid on the glued troops and the healer and heal spell can not heal them whilst they are glued.
my idea would be for this to cost 1,000 gold take up a 2X1 square (can be rotated) and be able to have 8 at one

