Dracthyr Evokers will be available for play starting tomorrow and here’s an important consideration for those planning to make one on their main server.
The first Dracthyr Evoker created on your account is free and does not require a Level 50 character on the server. To take advantage of this, you can create your first Evoker on a server you do not play on for whatever reason; maybe you have a friend playing on that server, maybe you’d like to have a character of the opposing faction.
You will still be able to create your second Evoker on your main server granted that you have at least one Level 50 character there.
When you create your first Evoker on your main realm, you will be locked out of the option posted above.
Source: Reddit