duplicator spell : it can create a duplicate of any troops in the area of spell ( the mirror troops have half hp and dps of the real troops)
cost:20.000 elixir for level 1
training time: 30minutes
spell duration 4~5 sec for level 1
each lvl add's : 0.5sec more duration and 10℅ more hp and dps .
spell has only 3 levels to not being OP
