From the southern swamps has risen a king of lizardfolk, rumored to have demon blood in his veins which gives him magical lizards-and-snakes themed abilities as well as the physical prowess of his people. Quickly carving out an ever expanding empire rumors quickly spread about him. Among them includes the rumor that while he has 3 official wives like all lizard chieftains before him, he's in the habit of raping any woman- lizardfolk or not- that strikes his fancy.
And as the oracle has shown you he personally murdered your parents and repeatedly raped your sister until she was pregnant with his child. In your hunt for revenge you've also heard that she and the baby died in childbirth. Now you've finally fought your way past his private guards and are ready to take revenge for not only your family but for the hundreds of women he's raped for sport.
But why is he smiling?