Originally Posted by
JHongHead
Crippling Tower is more of a utility defense than is a damaging efense. This tower shoots harpoons that slow down enemies that rush into your base. This tower has a very low damage output but is very useful utility wise. It has a favorite target of troops that favor defense buildings like Giants and Golems. It does not lock onto a single troop; for example, once a giant is crippled, The Crippling Tower will look for an other troop that has not been crippled.
For each upgrade, a crippling tower gains more slowing rate, and also a little bit of damage. This defense can be unlocked in Town Hall 8, and costs 1,800,000 gold to build.