Hammerhead Titanothere from James Cameron's Avatar.
The hammerhead titanothere (Na'vi name: angtsìk) is approximately eleven meters long, which is almost twice the size of an elephant, and is essentially a six-legged, monstrous version of Earth's brontotheriidae.
During the Assault on the Tree of Souls, Eywa sends a group of titanotheres to help the Na'vi in their battle against the RDA