Was talking to a friend the other day and came up with a little twist for end boss fights. The idea is that after fighting your way to the end boss he offers you a choice. Instead of an instant fight a dialogue starts between the players and the boss. The boss then offers the players a chest with unknown items in it if they would just go away and leave him alone.
The items could not always be junk. There would have to be a chance for some decent drop although at a lower rate than it would be for killing the boss. Also if you take the chest the boss and any minions with him become untargetable. Any named items that may drop in this chest could possibly be a bit weaker than the originals for killing the boss.
The chat could be done so that the party has to decide as a whole what to do, or it could be left up to the individual members. If left up to the individual members any that take the chest would not be able to help the players that don't in any way. This means that healers could not take the chest then stick around to heal the rest of the players that don't take it.
This also should only be a random occurance and not happen every time the end boss is encountered. So the question is what would be your decision if this were to occur.
I feel it would place an interesting twist on end boss fights. Would like to see what others think of this idea and what could be done to polish it up a little.