When you hit 66 go Caverns of Time, take first "quest" from dragon at entrance (he will taxi you down, later you can ask him for the same again), deliver the quest. Take new quest, which will be very boring "walk around" and "listen to crap" - you have to finish this one, so you can get a quest chain that lead you through Old Hillsbrad Foothills.

Visit Soutshore while you are in OHF and just lurk around, check all those famous names and listen to interesting talks. This is really OLD Hillsbrad Foothils and there are many toons from lore in their "old" roles.

Check a path from Southsore to Tarren Mill and SilverPine as you can purchase some unique items in there (limited supply).

• [Formula: Enchant Shield - Intellect] from [Aged Dalara Wizard]
• [Pattern: Riding Crop] from [Thomas Yance]

Blow up the interment camp.

One person needs to grab the explosives off the dragons at the beginning (either quest Taretha's Diversion or just ask NPC kindly to give you load of explosive). Clear out the 5 lodges and then click the barrels inside. The first boss comes after you set them on fire so make sure you drink up and buff up before setting the last explosive. He is a warrior so melee DPS, watch for the whirlwind and run away (strafe, not back peddle) from it so you don't take a 2k hit. Priests, watch for the mortal strike and be ready on those shields if it brings your tank low on hp. If he fears and goes after a caster, drag him to your tank who will be immobilized.

Rescue Thrall.

Go into the keep at the top of the hill and clear into the basement. Everyone turn in your first quest and take his second. Once you have buffed Thrall and everyone has his quest, talk to him again and start the escort. BEWARE, once you start Thrall doesn't stop. During each fight, casters, position yourselves between the mobs you are killing, and the ones you will be killing next and do NOT loot after the fight. Immediately start drinking when the last mob goes down. Melee, bandage up cause those casters aren't getting much of a break at all and need to drink. After about 4 waves, you will get to the gates and the next boss will come in. Enjoy your first break while he and Thrall chat, but its a short one. He comes with 2 adds that need to be killed first. The boss is a pally so watch for the stuns and heals.

Go to Tarren Mill.

NOBODY TALK TO THRALL. Rebuff and heal and mana up before talking to Thrall. He will hop on the horse and ride off to Tarren Mill. He will first stop in the barn, then the chapel and finnaly the inn. You will have to fight a wave of mobs at each place. Remember, Thrall doesn't like to stop so casters again position yourselves between the stuff you are fighting and where you are heading so you can drink and not have nearly as far to run. Once you clear the inn, you will find Taretha. Again, NOBODY TALK TO THRALL OR TARETHA until you are all buffed, healed, and full mana. Talk to Taretha and start the final event

The Infinity Dragon Flight.

Run back outside and in front of the chapel. You will have 3 waves of dragonkin and then the last boss. The first wave has 2 melee and 1 caster dragonkin. They come from in front of the chapel. The next wave will come from the left (facing away from the chapel). This will be an identical wave. Once the last one dies, you will get a wave of 4 from where the first wave spawned (3 melee and 1 caster). The Melee will mortal strike so priests, have those shields ready for when they get MSed. THe casters will cast corruption, shadow bolt, and a curse that increases damage taken. Druids and Mages need to decurse that ASAP. Hunters, you will want to be proactive in your traps to get one that is incoming. Go to where the mobs will be coming from and drop the trap before that wave even spawns. Priests, drop shields on your tanks just before the last thing dies in that wave. You will have little time to drink between these waves. Druids, you will most likely want to hibernate the caster mobs. Also if you aren't tanking, you need to go back by the chapel steps between waves. And finaly, fear is your friend here. Priests/Locks, you AE fear will be really nice when your tank is trying to pick up those 3 melee on the last wave. Do them a favor and fear them off so you can get a chance to get them under control.

The boss is also kinda tough. He has Garr's anti magic pulse that will eat your buffs, he has an Dot that deals shadow damage. He has a knock back so tank him up against a wall. And finally, like all dragons, he has a breath weapon, but since you are tanking him against the wall, nobody but the tank should be getting hit. I would highly recomend a warrior or druid tank over a paladin. Pallies will suffer from their righteous fury constantly being dispelled and so they will have a harder time holding aggro.