LFD Level: 75 – 80 (Heroic Level: 80)
You can find the Halls of Stone dungeon within Ulduar, The Storm Peaks.
The coordinates are (39.6,26.5)
Once you kill 1st boss Krystallus jump down the hole in floor behind him for shortcut back.
Heroic Differences: Ground Spike summons spikes under a player inflicting nature damage.
2. Maiden of Grief
Heroic Differences: Any player hit with the Parting Sorrow bolt will take 1.0 shadow damage for each mana point consumed.
3. Tribunal of Ages
/i Speak to Brann Bronzebeard to activate fight. Run red beam out. Move away from player hit with Dark Matter (purple glow on you). Adds will spawn, kill them quickly. You can interrupt any Lightning Bolt & Chain Lightning spells.
4. Sjonnir the Ironshaper
/i Static Charge zaps nearby allies & enemies with nature damage. Lightning Ring inflicts nature damage to all nearby & increase damage taken. 20% health goes into Frenzy. Kill adds.