There are eighteen different packs to choose from. The last three are hard to become, but are extremely powerfull. If you think that you can get into one of the last three, recieve the impossible quest from the Celestial Farie, Stellarwing. Below the packs are listed:
If you don't enjoy it, you'll annoy it.
If you enjoy it.... well, it will still be annoyed.
but fear not, It is very annoyable, so it isn't your fault.