Evilprodigy
Donor
Tzykanion, apparently it's a polo-like game adopted from the Sassanids, and popular among the dynatoi until at least the 13th century, with several rulers dying on the field.
Sounds like a great way to get rid of unwanted nobles. Instead of snakes in their beds, poison in their cups, and swords in their cut they can just be trampled at Polo.