After watching the video of the Ghost-Faced Mastiff King killing a lion, many people were shocked by the Ghost-Faced Mastiff King’s fighting power. However, they did not know that such videos were not true. The Ghost-Faced Mastiff King was a kind of hype created by mastiff breeders who were motivated by some interests. The mastiffs that came out are said to be invincible except for the "Green Wolf Mastiff", another fictional Tibetan mastiff that came from speculation, but in reality there is no such creature as the Grimace King Mastiff.
Although real Tibetan Mastiffs have strong fighting power, they generally cannot defeat adult lions, and there is no case of killing a lion. There are not many Tibetan mastiffs in the wild, so it is difficult to encounter lions.