In the Game
Mammotherium is a creature that is fused with the Woolly Mammoth and the Elasotherium.
It developed the body of Elasotherium and the horn of Woolly Mammoth. The thick fur was also inherited from Mammoth.
In stats, this creature is known to be the most strongest Savnnah creature. Very expensive, you should try getting the creature in late game. It would be advised to not work on getting it when you are busy with other things, or have objectives.