This is a fairly small mod that has been tailored to work specifically with the warlock class. It features spell notifications for events such as an enemy gaining cloak of shadows or spell reflect (and when they fade), if one of your spells is resisted, if you gain shadow trance (the nightfall buff), and much more.
It has been specially designed to display only important and relevant information, to help reduce any clutter or spam. For example, it will not display if your shadow bolt is resisted, but it will display if your corruption is resisted. The reasoning behind this is that if you see a DoT resist, you know you need to instantly try to recast it, whereas a shadow bolt resist is just disappointing, but not exactly what would be considered important information in most PvP scenarios.
It also includes short and non-intrusive sound clips to accompany most of the various warnings. All spell resists will play an identical 'thud' sound, hostile enemy buffs also share an identical sound, but it gives events such as Nightfall/Backlash a unique and easily distinguishable sound of their own. The idea behind the sound clips is that eventually, after enough play, you will barely need to read the text at all. If a rogue is chasing you and you hear the familiar hostile buff sound, you know he just popped cloak of shadows and to keep running for your life.
Also I am afraid that this mod is not customizable in any way (and as such there is no ingame /slash command). Sometime in the future I would eventually like to add a fully customizable options interface to it, as well as localize it for all available languages, but unfortunately that is all beyond my limited programming knowledge at the moment. If anyone out there would like to volunteer to do either of those, please let me know.
But hopefully, for most, the mod is designed well enough that there should be little to nothing that you wish to change. If you still have a strong desire to change something, I encourage you to open the .lua file with Notepad and to look around for yourself. The code is all fairly straight forward, even for those with zero coding experience. If you want to remove a sound effect from an event, just delete the /PlaySoundFile line, etc.
Enjoy!