The infection.

*In the bustling forest of Isla Nublar, there lies an ancient saying, "Don't let the Z-Rex bite." There are many implications to what this "Z-Rex" is. But, one thing is for certain, the Z-Rex is an Undead Tyrant. You, a large, tan, green and orange Tyrannosaurus Rex, is especially skeptical of this story. You're too busy watching the Therizinosaurus argue over dominance. The rest of the herbivores are grazing the very grass you step on. Until you see something pale, something large and rotten.*