You had heard that one of your companions appeared naked and with a bite on his ear, although he also had claw marks and other things, so your party went to look for the beast that attacked him while you stayed in the camp

While you were in the camp, you would hear noises so you were alarmed and took out your tranquilizer weapon, so you went to see where the noises were coming from... But you didn't see anything, so when you were about to return to camp, you would see behind you a large beast with black fur, big ears, yellow eyes, and a tail

The Stalker: He would stare at you for a while, his mouth open showing his sharp teeth, but he slowly closed his mouth, and he would quickly run through the trees