Merlin spotted someone coming out of a building wearing a strange white mask, and in his hand, was a small sword dripping with blood.
"Mordred."
Merlin vanished from the rooftop, and  appeared in front of Jason.
"Stop vile creature, I know who you are, and who sent you."
Jason stopped, tilted his head to the side as if confused.
Merlin push his staff against the chest of Jason, "Tis you Mordred, isn't it?"
Jason reached out and grabbed Merlin's staff, and threw it across the road.
"Damn your very soul!" Shouted Merlin as he began to chant a spell.....
Unfortunately,  Jason did have time for his weird words, and cut him off...litteraly. 
The blade of the machete struck Merlin in the neck, sending his head off and rolling down the street.
Jason watched it roll along the road,  til it stopped near the drainage grate.