Because what's the point of being a dragon if you can't breathe some kind of substance or energy at your enemies, even if it's only halitosis?

Double quotes can be used to describe a breath weapon, or type thereof, that is not specified. Wyrm notes, “For example B”skittles“ indicates that you breath (sic) skittles - presumably not the ten-pin kind!” and “You can also put the specific type of weapon after the option in “double quotes”. For example Bac”sulphuric“ indicates that you breathe sulphuric acid.”

• Bac: Acid.
• Bco: Cold or frost.
• Ben: Enchantment.
• Beg: Energy.
• Bfl: Flame or fire.
• Bhe: Heat.
• Bic: Ice.
• Bla: Lava or magma.
• Bph: Photons/Light.
• Bpl: Plasma. Presumably the charged particle kind and not the blood kind, but you never know.
• Bro: Rot.
• Bsm: Smoke.
• Bst: Steam.
• Bsu: Sulphur.
• Bvg: Volcanic gasses, e.g. pyroclastics.
• Bwa: Water.
• Bwi: Wind.
• Bzz: Electricity or lightning. Bonus points for the abbreviation here.
• B-: No Breath-Weapon.
• ~: Variable. For example B! indicates: “I can breathe just what I please!”
• ?: Unknown. For example B? indicates: “I haven't found out what I breathe!”

• |: Beam. For example Beg| indicates: “I am a Dalek! Exterminate! Exterminate!”
• #: Cloud. For example Bsm# indicates “When I breathe, ships need to use their fog-horns!”
• /: In the case of having multiple breath weapons, this can be used to separate them. For example Bfl/ac/“chocolate” indicates “I breathe fire, acid, and chocolate… anyone for melted acid drops?”