Slug shall take flight by growing wings, and swoop down to ambush small opponents... it will also build a nest, and even fight off crime! Its 3 abilities will be as follows:
-Maybe Flinch: Has a 50% chance to flinch a single enemy, does a small bit of damage. Also holds the knight still for about half a minute.
-Coffee Surge: Slug will fly long distances to find "good" coffee with dainty patterns never seen by the mainstream to appease its hipster master. This coffee will take the form of a single shadow expresso, which I am about 90% sure has been found out by the players officially and is not spoiling anything.
-Bitter disappointment: Slug will lie to its opponents, making them believe that their gear will be worth something some day. This will ruin their dreams of owning decent weapons.
Slug also has a passive ability that makes its attacks deal normal damage, regardless of which harness is attached. Slug eats snipes while its knight is in Haven instead of pet food.
Your description seems to be exactly the same as the current Slug.