The Wall Wrecker is a ground unit with a knack for crushing walls and buildings. Once deployed, it aims for the Town Hall and mercilessly ploughs through walls and buildings until it gets there. It deals extra damage against walls.
If the Siege Machine contains donated troops, the troops can be deployed at any time. Deploying troops will destroy the Wall Wrecker. Troops are automatically deployed if the Siege Machine is destroyed by enemy defenses.
The Wall Wrecker can be used with no Clan Castle troops inside it to help you destroy walls and buildings and distract enemy defenses.
Upgrade the Wall Wrecker in the Laboratory to increase it's hitpoints as well as the damage it deals.