Well someone in a facebook group said he uses this trick to guarantee unrefined gems in legendary everytime (since most people manage to kill 1-2 boxes, but not all)
If you just skip turn during chest wave until the chests explode, the goblin will always come to steal one chest, the one with event treasure.
Now that chest will be in the same location if you force quit and resume to start from the beginning.
He memorizes the location of that chest, and force quit the game, then re-enter and let his Warlord pull that chest to front and focus kill for all the event loots.
I'm not sure about this, someone try it? lol i'm at work and have no warlord
It's kinda pointless to do legendary if the goblin steals the treasure
But it's also kinda lame if we have to guarantee our treasure by using this force quit thing.
Those CC units come in handy though :3