1. Defeat 15 Master Tamers on Kul Tiras or Zandalar with a team of all level 25 Elemental pets.
2. You should have at least 10 appointed fully leveled Elemental pets with which we can do the achievement.
3. You need to provide your account.
4. Your character's level should be 120.
5. ETA: 1-2 Weeks.