The grim reaper would not be a new troop but a way of rewarding a successful defensive win.
If your base manages to fend off an attack the grim reaper would reward you by giving you a % of the cost of all troops defeated (As you help the grim reaper to condemn souls). The % would depend on two things
(1) the level of the grim reaper
(2) the league that you are currently in
The idea is that you would receive
20% for gold
30% for crystal
40% for masters
50% for champion
But to revieve the higher league's bonus you would need a higher level grim reaper so if your in champion but only have a level 3 reaper you will still only revieve the masters bonus.( lv1=gold lv2= crystal lv3=masters lv4=champion)
To level up the reaper you will not only need resources but you will need a certain amount of defensive wins before you can upgrade.
The loot received will be stored in your clan castle and you will have to reset your reaper after every 3 uses which will cost you (150-->600-->1200-->2400) dark elixir depending on the level. The high cost of dark elixir is needed to power the reaper but don't forget if you get attacked with a lot of dark troops you will revieve a lot of dark elixir
The grim reaper will only be activated if 10% or more of your base is destroyed
If you got sniped you would automatically lose hence you would not activate your Grim reaper. It is only activated once your base gets hit for 10% if your town hall is destroyed before this you will not activate your grim reaper





