You can find The Stonecore dungeon within Deepholm.
The coordinates are (46.9,51.7)
/i Channels a Crystal Barrage at a players location, move away. Dampening Wave inflicts shadow damage to players & adds a healing absorb for 6 sec. Boss burrows underground, kill Rock Borers quickly. Avoid crumbling ground where boss will charge out of.
Heroic Differences: Crystal Barrage will also summon Crystal Shards mobs in the area.
Heroic Differences: Crystal Storm is cast after boss lands from creating Stalactites. Hide behind a Stalactite to avoid the storm.
/i Slams the ground in front of him damaging all close enemies. Erupts spikes from his body for 10 sec, players who attack with melee or ranged will take ticking arcane damage, this stacks. When the spikes shatter they are fired damaging nearby players.
Heroic Differences: When boss slams the ground he also uses Rupture which causes 3 spikes to erupt in the direction he is facing, avoid these. Just before he shatters the spikes he uses Paralyze stunning all enemies for 8 sec.
4. High Priestess Azil
/i Curse of Blood increases a players physical damage taken for 15 sec. Interrupt Force Grip. A Gravity Well is summoned at a players location, run away before it pulls you in. Kill Devout Followers during Energy Shield. Avoid the shard of stone thrown.