An addon the creator redesigned from the original 'Nurfed Hud'; it's now made to be far more intelligent. Here's how it works: "When you go into combat, it'll light up fully, and when you leave combat, it'll dim out. When your health or mana is back to full, that bar will disappear completely out of your way." There are more features which you could get to know more about once you have it downloaded and installed.

CHANGELOG:

* Added a variant to the EVISCERATE NOW notification for druids, which says [obviously] FEROCIOUS BITE
* Changed the way that the EXECUTE / EVISCERATE / FEROCIOUS BITE notification works, so that it will show up in RED letters when ready, but you are too low on mana / rage / energy, but turn green when you have enough.
* Changed the way that the combo points display for druids' cat-form and rogues, so that they are color coded to further enhance the whole idea behind this HUD that it's to make the player know everything they need to know about the fight WITHOUT having to look away from the middle of the screen. Now, 1 [combo point] is colored red, 2 is orange, 3 & 4 are yellow, and 5 is green 'for go.'