Magister Serena is obtained from southeast of Talador. After finishing up Due Cause to Celebrate, Magister Serena offers to join your ranks.
Magister Serena is available only if you have built the Arcane Sanctum to your garrison outpost in Talador.
1.You will get Uncommon follower:Magister Serena.
2.You need to provide your account.
3.Your character needs to be lvl 96.
4.ETA:1day.