Antennae
From The Wajas Wiki
Antennae are a type of Potion Mutation. They can be permanently added to your waja by using a Arista Potion. Antennae give your wajas long, insect like antennae coming from their forehead. This mutation cannot be colored and so always appears in a brownish black color.
Mutation Appearance
All examples feature wajas with FF0000 (pure red) Antennae. However, this mutation can come in any Hex Color as well as any Texture.