Instructor Razuvious is the first boss of the Military Quarter in Naxxramas. The typical strategy on the 25-man version of the the fight is to have a priest mind control one of his four adds and use that add to tank the boss, because Razuvious hits far too hard for normal tanks (hundreds of thousands on plate). But who needs a traditional strategy, right? A Team, of Stonemaul, decided they would do this fight with no priests.
The trick was to have a mage constantly spellsteal Bone Armor off of the trash leading up to Razuvious. The mage then tanked the fight, the healers kept the mage up, and all went well. The mage that had been tanking did die around 40%, but another mage hit the spellsteal, picked up the boss, and the fight went smoothly from there. There's a WWS available, if you're curious. The reason the mages don't come out on top for damage in is that it's all absorbed by Bone Armor (otherwise you'd have some very dead mages). Let's hear it for creative methods!