Well, most of the time fury seems to be a waste of pillz...
It can be quite useful in many situations:
You have a character with +X life per damage. Using fury means doing at least 4 damages and sometime even more (Kenny with +2 lifes per damage mean you'll get 6 more damages!).
If you apply lesson #2 "thinking in less than 4 rounds", fury is a good and quite unexpected way to reach your KO
Dont use fury at all if you really needs to win most of the forthcoming rounds. You better save thoses 3 pillz to get an attack advantage.
Whoops, accidentally pressed something on the last post.
Again, once again, somebody doesn't know the difference between "Noob" and "Newbie".
Noob is considered the lowest of the low, you time out battles on purpose during Tourneys, you spam, and you swear randomly.
Newbie is somebody who is new to the game.
Using Fury when you see a bluff turns the game around.
You have 5 life-10 pills. Your opponent still has 12-7 pills.
You have Copper and Lehane left. He has C Wing and Dregn.
It's his turn, he used C Wing.
It's only right to use Copper and Fury. But you don't pill him anymore.
You just need guts to fury him.
Turns out he didn't pill C Wing.
How the match is in your favor because of fury.
You just have to pill it 7. And he will use Dregn with 8 pills.
You win after that round.
In short, Fury turns the match. Whether you're down by 3-5 life. You can still catch up if you have the right cards.