Traits

Extra mouths where they otherwise should not be. For example, they can get a maw in the belly, throat, or an extra mouth on the face or a tail maw. If an extra mouth is put on the face, the jaws may be edited to fit the second mouth.

https://drakiri.com/character/I-1858
(Chomp gave this Drakiri a tailmaw)

https://drakiri.com/character/I-1750
Chomp turned this Drakiri's entire neck/belly into a huge gaping maw full of teeth)