I've thought of a new possibly upgradable trap type, sticky traps!
Any ground troops that pass over it would be stuck to the ground for a few seconds unable to move regardless of the size or type of troop (unlike spring traps) the length of time they are stuck for could be a possible upgrade and the trap could be switchable between 'air' or 'ground' so if it's set to 'air' it would act like a flypaper it could also stay active throughout the attack catching and holding any troops again and again as they pass over it (up to a maximum number at any one time).
Any further thoughts would be appreciated!



