You need to participate in the Lightbearer event by using the torch at all the basins. If your server is successful you'll gain a document as one of the rewards. To get the reward you need to go to kazordoon.Them at the Christmas event (between 12 and 30 dec) you need to speak with Santa Claus and he'll reward you when you say the world "present" to him. Note that you don't need to own the document with you and you must get the document as a reward (buying it won't allow you to tame the Blazebringer).
Reference:
Lightbearer portuguese or Lightbearer english
BlazeBringer Portuguese or BlazeBringer English
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