Shard of Archstone
Drops from Havak. Drops from Havak (a rare elite in Kun-Lai). When activated turns you into a stone statue of a mogu.
The 
Shard of Archstone is a toy that transforms you into a stone mogu statue, and it drops from Havak, a rare elite found in Kun-Lai Summit.
Guide awaiting review
Locate Havak in Kun-Lai
Travel to Kun-Lai Summit and find Havak at 57, 76. Havak is a rare elite, so the spawn may not be up every time you visit.
Defeat Havak and loot
Defeat Havak and loot the Shard of Archstone directly from the body. The drop is not guaranteed, so you may need to kill Havak on multiple visits.
Using the toy effectively
Activating the Shard of Archstone transforms you into a stone mogu statue — you cannot be moving or in combat when you activate it, and casting any spell will cancel the effect early. Nearby hostile NPCs will ignore and cannot target you while you are in statue form, though you can still be hit by AoE damage. Pairing it with 
Salyin Battle Banner increases its usefulness significantly; use the macro: #showtooltip /castsequence reset=10 Salyin Battle Banner, Shard of Archstone.
