Magtheridon's Lair

Magtheridon's Lair is a lvl 70 25-man raid. It's entrance is located at the western side of the Hellfire Citadel. It is a fairly short raid with just one boss - Magtheridon himself.
A bit of lore: Magtheridon was defeated by Illidan and was presumably killed by him. Now the Pitlord is imprisoned under the Hellfire Citadel where Fel Orcs (Illidans' minions) siphon his blood to empower the Fel Orcs forces.

Just spelling out a few things for anyone new to soloing Mags AND not quite at those uber levels of invincibility in old content ;)

1) Around the perimeter of his lair there are stationary and roving mobs, in sets of three. These must be taken down. Any you miss will run into the central area when the Mag fight begins.

Naturally if you are tanky then you'll be able to solo these at a slightly lower level.

2) Next you enter his circular lair. There are these single mobs spread around, seeming to channel his bonds. They have cubes. You do not click the cubes and never will be able to click the cubes. Just eye candy.

Agro one of the channeling mobs. That causes all to run at you. They heal each other. Devise your own strategy to nuke them down. I found this phase of the fight to be more crucial than the next phase. I needed to overcome the heals.

You need to kill as many as possible so that few remain when the fight automatically shifts into the second phase. I had two left.

3) Phase three begins after a while - Mags activates automatically. Stand with your back against a wall. Do not move. You will notice his attacks "trying" to move you. Always be doing something to ensure threat is maintained. Back against the wall was the key for me. (My first attempt he moved me and he managed to reset).

Obviously tank and spank. You know your own class for when you need to heal through damage.

Generally speaking, for the level 70 TBC raids, if you are level 85+ and with reasonable gear and skill then by all means attempt to solo. Anything less and you should be cautious or bring a friend.

That would be called Duoing my friend