I Love the Smell of Saronite in the Morning (10 player)

The comments here are pretty useless.

To do this achievement you need to tank the boss and WAIT for enough Vapors to spawn. He will then suck up the vapors and spawn the animus. Kill it, then kill him. Done.

I love the smell of napalm in the morning

Smells like... Victory

Apocalypse Now, Quite fitting.

Kill General Vezax on the hard mode on normal dificulty.

Vezax spawns a total of 6 Saronite Crystals over time. Killing these Saronite Crystals creates Saronite Vapors on the ground, which allow casters standing in them to regain mana to counter the effects of the permanently active Aura of Despair.
If no Crystals are destroyed, eventually 6 Crystals will be alive at the same time. These Crystals then merge to form the the add Saronite Animus. This add casts the stacking damaging debuff Profound Darkness on the raid and Vezax gains the immunity buff Void Barrier as long as this add is alive and stops casting Searing Flames.

Lack of mana regeneration means that caster DPS without functioning mana-regaining mechanics will have to make extensive use of the Shadow Crash buff and resort to wanding when not buffed. Healers will have to be very conservative with their mana to ensure they have enough left at the end to heal the massive AoE damage from the Saronite Animus.

This achievement requires the raid to kill this add before killing Vezax. Since Vezax is invulnerable as long as the add is alive, this seems like a sensible approach once the Saronite Animus has spawned. The entire raid being hit by increasing AoE damage while healers are running on fumes also makes it advisable to kill the Saronite Animus in a timely manner. Killing any Crystals before the 6th is spawned will make sure the Saronite Animus never spawns, as will killing Vezax before the 6th Crystal has spawned (though it is not likely this is possible).