<clunk>
$&%^&*#!!!!!
I'd write some flavor-text, but I don't know enough about these creatures other than saying they are longer-fanged, prehistoric counterparts of their base creatures.
Very well, I think we'd better keep it fairly simple. How's this for a beginning.
A great cat with long canines protruding from its upper jaw. Its body is heavy set and rippling with powerful muscles.
Saber-toothed cats are prehistoric carnivores who hunt the large herbivores that were abundant in those lost ages. There are many species of saber-cat, some of which are only distant kin to each other. The above stats categorize saber-cats by their size - e.g. a saber-toothed lion is roughly the size of a modern lion, but is probably not closely related to a lion.
A saber-toothed leopard is about 4 feet long and 150 pounds, a saber-toothed jaguar is about 5 feet long and 250 to 300 pounds, and a saber-toothed lion is 6 to 8 feet long and 500 to 700 pounds.
COMBAT
Saber-toothed cats are ambush predators, like most cats. They stalk up to prey and pounce, then tear into their victim with claws and fang. A saber-cat will usually finish off a victim with a saber-fanged bite.
Saber toothed cats can do terrible damage, but are no more courageous than other cats. They will usually retreat if a fight turns against them and seek easier prey.
A few species of saber-cat may hunt in small prides. Such a pride can predate very big animals, such as mastodons or aurochs. They tend to concentrate their efforts on bringing down a single opponent.