The Ashstone Core is one of the newest companion pets in the game.
It is a white version of the Elementium Geode companion pet miners get.
The pet comes from Core of Hardened Ash which drops from the boss Golemagg the Incinerator in the raid Molten Core.
He is part of the achievement Raiding with Leashes.
In the picture above, the Ashstone Core is under the effects of Papa Hummel’s Old-Fashioned Pet Biscuit. The biscuit doubles a targeted Non-Combat Pet’s size for as long as it remains at its master’s side. The biscuits are a common loot card from the trading cards. You receive a stack of 50 biscuits when you redeem the code and you can stack up to 250 biscuits. Get biscuits for your pets.