Ending Reins

Ending Reins is an achievement in the War on the Black Crag accessible in the Banerein boss fight.
==Strategy==
At the start of the fight, you may notice Banerein levitates above lava, and there are six vents across the platform you engage him on. In order to get the achievement, you need Banerein to "unleash destructive waters". Banerein has an ability called Cross Chop which he uses in Phase III. You need him to Cross Chop the vents, severing them and heating the lava. After he does this six times, Banerein will increase his damage output for two minutes and have a soft enrage state. After it is over, Banerein will say he is overheating, and then call upon the elements of the Black Crag to summon a horrendous flood, dealing 300,000 damage to the raid. Defeat Banerein after doing this and the achievement is yours.