I own the first edition of The Dresden Files RPG and played it a decent amount. I really enjoyed the game. I haven't played in quite some time but yesterday I picked up Dresden Files Accelerated at my local gaming store. It looks really amazing but I was disappointed that some of the Mantles I'm interested in playing are not available. I want to run a campaign NOT in the actual Dresden-verse but very, very similar. I really want to play as a Black Court vampire so I can be a more traditional Stoker-esque vampire but there is no Mantle for this in the book. Is this because they are more powerful than normal Mantles or something?
How can I alleviate this? Are there rules for building your own Mantles?
Thanks in advance!