The Mender is a part of the oldest cells in the game, It Costs 1 DNA. The description is "Earn XP by healing other creatures on contact"
The stats of the Mender are
+ 1 Appetite - 1Speed + 2 Health + 0.5 Regeneration
The Mouth is able to eat both types of food of Meat And Orbs Getting 5 XP For Eating It