You can find the Magister’s Terrace dungeon within Isle of Quel’Danas.
The coordinates are (29.7,23.0)
1. Selin Fireheart
Heroic Differences: steals mana by using Drain Mana on a player.
/i Uses Chain Lightning. Arcane Shock deals ticking damage. At 20% Overload deals arcane damage & increases your damage taken. Boss summons Pure Energy, when they die do more arcane damage.
Heroic Differences: Summons x2 Pure Energy at a time.
3. Priestess Delrissa
Heroic Differences: Medallion of Immunity removes all movement & loss of control effects from herself.
4. Kael’thas Sunstrider
Heroic Differences: Boss is protected with Shock Barrier, absorbing damage & immune to interrupts. After Shock Barrier interrupt Pyroblast.