Allow builder to attack Obstacles during an attack.
I searched and didn't find this idea.
Allow users to assign an idle builder to their army (housing space 5?). When attacking if they drop their builder it attacks its first preference, obstacles. If it clears an obstacle the attacker receives a percentage of the experience points or gems for that obstacle. If their builder is killed during the attack, they must revive it using their own gems. By using gems to revive your builder will add risk for the attacker to use a builder plus whatever housing space it would use.
This could promote another way for users to use gems but also give them a chance to earn some gems too, Supercell could do the math to make it work for both the company and the user.
thoughts, suggestions?