A fearsome chimera of various types of dinosaurs and other animals combined. The Indominus is more fearsome than any normal tyrannosaur and outright malicious thrilling the idea to kill and make animals suffer.
The first Indominus rex was created by a mad alchemist known as Wu. Wanting to use the same arcane arts that created the chimera he combined the traits of various animals saurian and non-saurian. In the end the creature killed their creator and broke out.
Made with the base of a tyrannosaurus rex they combine traits of countless other theropods, avians, and cuttlefish allowing the creature to have a disturbing level of intelligence and camouflage capabilities.
The indominus is a bloodthirsty monster. Preferring to kill animals for the sake of the hunt and often leave behind carcasses of massive animals in the areas they reside in. Sauropods seem to be their ideal prey, running up and slashing at the immense animals necks to inflict massive wounds. These piles of bodies can attract other beings like scavengers and some humanoids, that the indominus will then turn to hunt, as they view humanoids as a thrilling challenge.