Effect: Apply Aura: School Absorb (Arcane, Fire, Frost, Holy, Nature, Physical, Shadow)
Value: 1200000
So, that is a massive 1.2 million damage absorbed. They also cast it quite often too ( every 10 sec or so) and best of all it is spellstealable. Now you must be wondering what the exploit is in spellstealing a spell from a mob... Well, here it is:
Arcane Talent: Incanter's Absorption Rank 3
When you absorb damage your spell damage is increased by 15% of the amount absorbed for 10 sec.
How it works is very simple, every time you get hit it adds a buff on you for 10 sec, with 15% of the damage that the attack was absorbed. You can have as many as those buffs as you want, but bear in mind that each buff will fade after 10 sec.
So, lets make a quick calculation here... You get the buff... get a couple hunters to MD to you and you pull Razuvious. He hits you for 80k (as a mage) 4 times, that is +12,000 spell damage to you each hit.
Since that buff absorbs damage, you do not have to worry about pulling aggro at all, we've had our mage tanking all the death knight wing, 3 shotting mobs, running around with 50k to 100k spell power tonight. The important thing is to keep all the 3 cavaliers on you, so you always have a bone shield to spellsteal.
Do note that this works in 10 man version too, but sadly the 10 man version of the bone shield only absorbs 50k and not 1200k.
Here is the video that inspired this exploit: