* [LTR] Implement The Balrog, Durin's Bane
I could use someone more experienced for this card:
Should the watcher `PermanentsSacrificedWatcher` be initialized locally in the card's class, or is a global initializing in GameImpl.java alright? I went for the latter for now, as my base for implementing the static cost reduction was Blood for the Blood God!
* apply review
* no longer instantiate watcher on every game.
