Trickery.

Stelios received a lot of benefits for returning the body of the demigod but he never did return the head. Back then, when he was asked about the head of the demigod, Stelios had said that he destroyed it. 

Now he is betting the head of a demigod of the sky god. What are the odds that it belongs to another demigod? Practically none. The sky god has a lot of kids but not many of them have winded up on the doorstep of the sun god and left their heads behind for safekeeping.

Staniel groaned when he saw the head that the sun god displayed for his item. 

"He clearly didn't put much effort into his excuse for having it. If he had said that he found it on the roadside, it would have been a better excuse than it showing up on his doorstep."

This time he shared his misgivings out loud with his siblings around him.

"How many of us will die this time if a divine war breaks out?"