The guards group near the campfire. None of them wants to leave the warm flames, yet someone has to go to make the patrol along the border. Of course, in this situation, the youngest of them is the one that must do the duty. He picks up a torch and leaves the others behind.
Nearly a half league away he finds something strange: as his torch casts light on the wall, seemingly random words appear in front of his eyes:
Silk Origami Bug track King
Colored crown Cross Piety Barbary
Avengers Widow Construction Cannibalism
Feather Apex Red Lily Circus
He has no idea what this could mean, but he is determined to not go back to the elders without a theory: who could have left these marks and what are they saying?
What are the four categories hidden in these words and who is the guard?
(The rules of a standard connect wall apply: you have to find 4 categories, each containing 4 connected word. The 4 categories are also connected, and help you find the final answer.)