It has a venom DoT effect which stacks nicely with carnivores with the bleed effect. It is also very fast, so feel free to go adventuring/hunting on a thylacoleo with this guy as your backup. Most significantly, it has a healing ability, so it looks like a high level with HP and Melee would do well amongst a group of t-rexes, potentially even in a boss battle. Very nice and easy tame too.