When they were pups, a rogue tigerbeast tried to drag away Kray-ekh'a, seeing the runt as an easy target, until Rok'aan came to his rescue and beat the creature to death with only a rock.  Even so many years later he still has the pelt in his dwelling, and while the skull was too damaged to make a trophy of, he got the teeth removed and gifted them to Kray while he was recovering.

Prompt from BloodRedHyena