Traits

Info:
Allows character to have a tail that developed into a domestic appliance machine, musical instrument or some type of decor.
Example: Flute, glass container with something in it (can't have living animals in it unless character is Peaceful or Aquatic subtype).

Subtype specific features:

• Flame - Can be a fire grill or something else with visible fire (This doesn't mean any other stuff that requires heat can't be used for other BFBs, but it can't have visible fire present)
• Frost - Can be a freezer or something else with visible ice (This doesn't mean any other stuff that requires cold can't be used for other BFBs, but it can't have visible ice present)
• Peaceful - Can be a container with living animals (not fish) in it. It's mandatory to have a door and breathing holes on the container. 
• Aquatic - Can be an aquarium with living fish in it. It's mandatory to have a door and breathing holes on top of the aquarium. 

Some other legendary types can have some fun specific "interactions" with this trait too, but it should be discussed.

Can't be a utility that is commonly considered / can be used as a weapon (since anything can be used as a weapon in general if you really want it).
If unsure about something, ask AmIYourHiro on discord.