Fat chance that the Red Proto-Drake will be gone any time soon since it's only a 280% flight speed mount. Still, anyone after the Red or Blue Dragonhawk mount (when Blizzard gets off their backsides and increases its speed to 310% instead of a measly 280%) from Mountain O' Mounts should count the Red Proto-Drake among the 100 that they'll need. Or you can just look a lot cooler riding on a big red proto-drake instead of a puny red or blue bird that looks like it would snap in half if a Tauren sat on it.

The achievements from the heroic five-man dungeons aren't as difficult as they used to be pre-Ulduar, but a lot of them are still a pain in the backside. They're all listed here per dungeon, all rated for their difficulty with the appropriate tactics and under the assumption that the groups trying for this are decked out in Naxx 25, Ulduar 10/25, or ToC 10/25 gear.

Utgarde Keep

On The Rocks

Defeat Prince Keleseth on Heroic difficulty without shattering any Frost Tombs.

Don't use AoE attacks, period. Any tank can take Prince Keleseth without relying on their AoE skills. Frost Tomb is an indiscriminate spell, so the tank, DPS or healer could be a victim. Take multipurpose classes if you're paranoid.

The Nexus

Split Personality

Defeat Grand Magus Telestra on Heroic difficulty after killing her images within five seconds of each other.

Simply using AoE attacks would do on Telestra's images, but groups with fewer AoE attacks would do well with controlling the amount of damage done to their targets. 40% for each image would do if there are DoTs on each. Keep an interrupt-capable class on the Frost image to cancel her channeling or else she'll refuse to die until her Blizzard's channeling time has finished.

Though she should split twice for the fight, killing her before the second split still grants the achievement.

Chaos Theory

Defeat Anomalus on Heroic difficulty without destroying any Chaotic Rifts.

Clear out all of Anomalus' rooms before you start this achievement. Your team will need several choke points to AoE the adds that spawn from the Chaotic Rifts without accidentally destroying any Chaotic Rifts. Your healer should be ready to heal everyone because of the massive arcane volleys from the adds until Anomalus stops channeling energy.

You'll need at least two choke points. The first choke point is the first ramp leading to Anomalus and the second is next to the ramp leading to the bridges that go to the south exit of the room. If these aren't enough, work your way to the south exit and beyond until Anomalus goes down.

Intense Cold

Defeat Keristrasza on Heroic difficulty without allowing Intense Cold to reach more than two stacks.

Equip your insignias and ready any of your root-removing spells to be safe. Once the fight starts, jump, strafe and squirm your way around the room to keep Intense Cold from stacking on you. If she roots you, use whatever you have handy to free yourself.

Even with the best gear, Keri will hit you with at least one Frost Nova.

Azjol-Nerub

Watch Him Die

Defeat Krik'thir the Gatewatcher on Heroic difficulty while Watcher Gashra, Watcher Narji and Watcher Silthik are still alive.

If your group's gear is good enough, you can DPS your way through this without caring about the little details.

Groups with lesser gear beware: two of the three Watchers are nasty. One will poison the entire party and the other will disorient the entire party. Both have interruptible casts, but a Shaman is preferred for their Poison Cleansing totem while Insignias can deal with the disorientation.

If you're taking it slowly, start the fight by killing the Skirmishers. They reset their threat tables frequently and hit hard and then turn your attention to the Webspinners.

And all throughout, keep everyone out of the web wrapping.

Hadronox Denied

Defeat Hadronox on Heroic difficulty before he webs the top doors and prevents more enemies from spawning.

Cheat your way through this with ease. Take any class that can drop their threat table and have them engage the mobs on the web. After they lose their threat table, the mobs will despawn. Everyone should then run down the web to Hadronox's lair just before the hole in the web. You have 30-45 seconds after Hadronox spawns to kill him. Don't let the Hadronox's poison kill anything or he'll heal.

Gotta Go!

Defeat Anub'arak on Heroic difficulty in 4 minutes or less.

It's a DPS race. Hit him until he burrows, then kill the mobs until Anub'arak comes back asking for more punishment. The time limit is incredibly generous.

Ahn'kahet: The Old Kingdom

Respect Your Elders

Defeat Elder Nadox on Heroic difficulty without killing any Ahn'kahar Guardians.

Take an off-tank with you and a second healer or have the off-tank survive long enough to nuke the boss.

Clear the area beyond Elder Nadox, particularly the balcony overlooking Prince Taldaram. Once you're fighting Nadox, take him to that balcony. Your off-tank should stay inside Elder Nadox's room and pull any Ahn'kahar Guardians before they go through the doorway and give Nadox immunity.

The Party's Over

Defeat Prince Taldaram on Heroic difficulty with fewer than five people.

Okay, so bring four people and beat the bloodsucker into the ground. You'll need to deal 40,000 damage to stop Embrace of the Vampyr before the victim is drained dry.

Volunteer Work

Defeat Jedoga Shadowseeker on Heroic difficulty without killing any Twilight Volunteers.

Jedoga gains a huge damage boost when one of the Twilight Volunteers is sacrificed. Melee DPS can be killed in one hit from a powered-up Cyclone Strike, so anyone in melee except the tank should beat feet until her enrage ends.

Volazj's Quick Demise

Defeat Herald Volazj on Heroic Difficulty in two minutes or less.

Doing this requires that all of your DPS be competent enough to kill the illusions during Insanity. If each of your DPS can kill their illusions within 20 seconds or less during both phases, you're golden. Just watch out for the Priest healer and its powerful Greater Heal.

Drak'tharon Keep

Consumption Junction

Defeat Trollgore on Heroic difficulty before Consume reaches ten stacks.

Trollgore casts Consume every 15 seconds. That's 15 seconds for the tank to position Trollgore in a niche or hallway that gives time for the DPS and healer to run out of Trollgore's line-of-sight.

Position an off-tank or melee DPS at the top of the stairs to deal with the adds that show up while the rest of the team takes to the fight downstairs.

Tank him in the hallway that you used to enter the room, with the DPS and healer standing behind either column. Every 10 seconds, everyone but the tank should hide before Trollgore casts consume.

Oh Novos!

Defeat Novos the Summoner on Heroic difficulty without allowing any undead minions to reach the floor.

The group only needs to position themselves on the stairs with the healer positioned to heal the off-tank and main tank. The minions themselves deal pitiful damage and don't swarm that well, so dealing with them until Novos' shields go down shouldn't be a problem.

Better Off Dred

Engage King Dred on Heroic difficulty and slay 6 Drakkari Gutrippers or Drakkari Scytheclaws during his defeat.

The raptors needed for this fight are located in King Dred's pen. Save time by waiting for King Dred to approach the entrance before you pull him, pulling 1 or 2 raptors at the same time.

Kill the raptors and as the fight progresses, pull more raptors to your tank by any means. The Gutrippers can reduce their target's stamina by 15% only once. Don't go overboard with pulling the Scytheclaws because each Scytheclaw can put a bleed effect on their target. Couple the bleed damage with Dred's damage and his bleed damage amplification skills and only a miracle will save your tank.

These raptors do not respawn. If you kill too many, try this achievement again tomorrow.

Violet Hold

Defenseless

Defeat Cyanigosa on Heroic difficulty without using Defense Control Crystals and with Prison Seal Integrity at 100%.

This is no real achievement. Many players don't notice the pink crystals on the walls around the room and can still keep the entry door at 100% the entire time. Wiping doesn't affect this achievement either.

Lockdown!

Defeat Xevozz, Lavanthor, Ichoron, Zuramat the Obliterator, Erekem and Moragg on Heroic difficulty.

Run the dungeon a few times and if you're not so lucky, spend the next week or so trying to unlock that one last boss for this achievement.

Dehydration

Defeat Ichoron on Heroic difficulty without allowing any Ichor Globules to merge.

Don't expect to do this at the same time as Defenseless.

As you fight Ichoron, her shield loses a stack for every hit she takes. Once those stacks are gone, she explodes into several Ichor Globules that spread around the room and merge in the center.

Around the room are several pink crystals along the walls. Assign someone to click on them whenever Ichoron's shield reaches 7-10 stacks. The crystals have a charge-up time. By the time the globules are out, the defense crystal should be ready to fire. After it fires, find another crystal for the next split.

A Void Dance

Defeat Zuramat the Obliterator on Heroic difficulty without killing any void sentries.

Focus fire on Zuramat the Obliterator, but have your dispels ready. His Shroud of Darkness reduces healing done to his attackers by 20% for each stack to a maximum of five stacks. With the AoE shadow damage done by the Void Sentries, this can turn very ugly if you spend more than a minute fighting him.

Gundrak

What the Eck?

Defeat Gal'darah on Heroic difficulty while under the effects of Eck Residue.

After killing everything in Gundrak except for Eck the Ferocious and Gal'darah, pay a visit to the giant gorloc. He's in the tunnel that opens up after defeating Moorabi.

While fighting Eck, stand in front of him when he casts Eck Spit. It stings, but it's the only way to get Eck Residue. Enjoy your ferocious smell for an hour.

Now make your way to Gal'darah and don't die until he does. You'll lose your Eck Residue if you do. Any immunity spells such as Ice Block and Divine Shield, so keep your fingers off your panic buttons.

Less-Rabi

Defeat Moorabi on Heroic difficulty while preventing him from transforming into a mammoth at any point during the encounter.

This achievement is a pain in the arse. The more damage you deal to Moorabi, the faster his transformations are. And if he transforms towards the end of his miserable life, your DoTs might kill him.

There are several party setups that will work. Some of the more popular ones involve at least one shaman with Reverberation who uses Wind Shear whenever it's available.

His base cast times are 10 seconds while he's above 50% HP, then 5 seconds below that. The cast speed increases based on how much health he has left. Below 30%, that cast time could be instant.

Depending on your latency, you can either time your interrupts or use one every 2-3 seconds after he reaches 30%.

Share The Love

Defeat Gal'darah on Heroic difficulty and have 5 unique party members get impaled throughout the fight.

While Gal'darah's a rhino, he'll impale one party member for a few seconds, dealing bleed damage while parading them around. If you're lucky, he'll impale each party member only once. If he feels like making you suffer for this achievement, you'll get repeated impalements for one party member. If Blizzard feels like making you suffer, your heal will disconnect and you'll wipe and have to do this all over again.