Crystalline Tear of Loyalty

This item is dropped by several rare mobs in Cataclysm, and indicates that the mob is intended as a rare hunter pet rather than a source of loot. However, hunters should be aware that even 25 gold can be enough reason for some players to not care one bit that you are actively trying to tame one.

Source

 * Ankha
 * Anthriss
 * Ban'thalos
 * Ghostcrawler
 * Karkin
 * Kirix
 * Madexx
 * Magria
 * Skarr
 * Skitterflame
 * Sambas
 * Solix
 * Terrorpene
 * Solix
 * Terrorpene