I do believe that killing everyone and piling up their skulls in pyramid style piles was the trademark of Timor the lame, otherwise known as TAMERLANE.
He did claim to be a direct descendant of GK, and did defeat bagdad, egypt, and persia, along with sundry other countries such as parts of India.
Believe it or not, he and a huge army were on the road to attack China itself, when he died at around 70 years of age.
The man was a genius.
Tamerlane