Ultimate Battle-Training Stone

The Ultimate Battle-Training Stone is a quest reward from the following quests:
 * Unearthed Magic
 * The Very Best
 * Teamwork Lesson: Krosus
 * Teamwork Lesson: Skorpyron
 * Teamwork Lesson: Ursoc
 * Teamwork Lesson: Xavius
 * Wailing Critters (quest)

This item is also sold by Lio the Lioness/Serr'ah in Dalaran for.