Amphicyonid

Amphicyon were a genus of Caniformian carnivores. They were bear like in build dog like in head and teeth and lion like in dexterity and tail, this would be your worst nightmare. It looked like it came out of a horror movie but even worse this is is a 1,200 pound hypercarnivore. It hunted animals like chalicotheres entelodonts and hyracodonts and ocasionaly even smaller carnivores. it hunted with ambush, it's legs are only built for short speed bursts. it hunted in packs it was clever it could drive off a daeodon or actually get in combat with an entelodont. here's how you make an apex predator 1. Smell it was very important to amphicyon at night it could smell out hidden prey like rabbits or track animals like camels or three toed horses. 2. intelligence it was a clever animal with heavily powered animals like chalicotheres one would act as a decoy while the otherwould junmp on its back and bite on the neck or ambush camels or horse and just nock them down and bite the head it outcompeted it's prime competition deaodon. but new competition arived such as pseudalurus or bone crushing dogs or short faced bears, these eventually drove it to extinction but survived in eurasia until the beginning of the glacial periods. They outlasted the nimravids, creodonts mesonychians and entelodont's they are trully master carnivores nothing ever dominated the planet like the bear dogs.