Dire tiger

Dire tigers, also called smilodons, are giant cats with a pair of huge fangs jutting from their powerful jaws. Due to these teeth, they are often referred to as saber-toothed tigers.Dire tigers prey on just about anything that moves. They will patiently stalk a potential meal, striking whenever the creature lets down its guard.

Description
Dire tigers grow to be over 12 feet long and can weigh up to 6,000 pounds

Combat
A dire tiger attacks by running at prey, leaping, and clawing and biting as it rakes with its rear claws