Heroic mode Magisters' Terrace can be a thing of beauty or a real pain. I find that while it's challenging and requires a lot of good social communication amongst participants, it can be a bit ridiculous at times. Especially the 9 mob pull right before you face Kael'Thas.
However with that said, one of the best rewards in any five man instance comes out of heroic Magisters' Terrace's Priestess Delrissa: the trinkets. The tanking trinket in particular makes me cry it's so great. Five hundred seventy more HP and an amazing live saving dodge increase. The DPS trinkets, casting trinkets, and healing trinkets are equally great. Let's take a closer look at them.