Chunk o' Mammoth

Source

 * 68-70, , and  Borean Tundra
 * 70-73, , and Dragonblight (low drop rate)
 * 76-77, , Sholazar Basin (mammoth has best drop rate)
 * 77-78 Storm Peaks
 * 79-81 The Oculus

As an ingredient

 * 350
 * 350
 * 375 /
 * 380
 * 380
 * 425