Famine was the first mythical creature I found, but I didn't realize I had to tame him and shot him in the head. Am I screwed now?
Edit - After failing to find Famine all evening, I finished up some more missing persons missions, and then finally found Famine on a cliff in Perdido. I lassoed him and then got pulled along as he fell off the cliff, lol.
I hit reload checkpoint, and thankfully he re-spawned again on the other side of Perdido away from hazards. Got my 100% now