Raiding with Leashes is one of the most exciting additions to Patch 5.1 which includes 12 new pet drops from old raid bosses. Collecting the set will reward you with the Raiding with Leashes achievement and highly sought Mr. Bigglesworth pet.
Temple of Ahn’Qiraj
Mini Mindslayer drops from The Prophet Skeram
Collecting all 12 rewards Mr. Bigglesworth, who is based on the cat from the Austin Powers movie. Dr. Evil’s cat, Bigglesworth was frozen with Dr. Evil which caused his fur to fall off.
Upon exiting the freezing necropolis of Naxxramas, Mr. Bigglesworth promptly found a warm spot in the sun to take a long nap in.