Defeat Freya while leaving at least 2 Elders alive in 25-player mode.

In the Freya encounter there are three mini bosses, Elder Brightleaf, Elder Ironbranch, and Elder Stonebark that you may choose to kill first, or leave up to engage hard mode. For this achievement, you need to leave two trees up. Each one brings a different buff to Freya and/or the adds she brings.

• Elder Brightleaf - Brightleaf's Essence
• Elder Ironbranch - Ironbranch's Essence
• Elder Stonebark - Stonebark's Essence

Pick whichever tree's debuff is best overcome by your group. Keep in mind that in addition to the debuffs, each tree still has their own sets of abilities.

Elder Brightleaf

• Brightleaf Flux - Changes Elder Brightleaf's damage and healing randomly every 5 seconds.
• Solar Flare - Inflicts 7,863 to 9,137 (Heroic: 12,950 to 15,050) fire damage on a number of targets based on Brightleaf Flux.
• Unstable Sun Beam - Increases damage and healing done by 5%, stacking up to 10 times. Canceled by Unstable Energy.
• Unstable Energy - Inflicts 12,950 to 15,050 (Heroic: 16,650 to 19,350) nature damage and cancels the effects of Unstable Sun Beam. Damage done is modified by the number of stacks of Unstable Sun Beam.
• Photosynthesis - Heals Elder Brightleaf for 10,000 damage every 1 sec. Used while inside a Sun Beam.

Tips: Because the Sun Beams heal, keep Brightleaf moving.

Elder Ironbranch

• Imaple - Inflicts 16,650 to 19,350 (Heroic: 32,375 to 37,625) physical damage every 1 second for 5 seconds. Stuns the target.
• Iron Roots - Summons Iron Roots that root a player and inflict 5,550 to 6,450 (Heroic: 7,800 to 8,200) nature damage every 2 seconds to them. Lasts until the roots are dead.
• Thorn Swarm - Inflicts 8,325 to 9,675 (Heroic: 12,488 to 14,512) nature damage to enemies within 6 yards of the target.

Tips: Make sure you have someone call out when they are rooted, so DPS can kill them. They will eventually kill the person if you just let them sit in it!

Elder Stonebark

• Fists of Stone - Decreases movement speed by 20%, increases damage done by 250% and gives Elder Stonebark's attacks chance to cause Broken Bones, which renders the target unable to dodge, parry or block.
• Ground Tremor - Inflicts 8,550 to 9,450 (Heroic: 11,400 to 12,600) physical damage to the entire raid, and interrupts spellcasting for 8 seconds.
• Petrified Bark - Causes melee attacks to damage the attacker as well. 60 charges (Heroic: 120).

Tips: When Stonebark casts Fists of Stone make sure you have your off tank a good distance away and have him/her taunt Stonebark. You really just want to kite him around for a short time to ensure he doesn't actually hit one of the tanks.