The Magnificent Stealth Pun of The Echoes Left Behind

In the story I just put in the title, Hecarim is said to get more monstrous every time Kalista and/or Ledros kill him. He has "died" by their hands over and over, but he keeps coming back. The pair's quest for vengeance accomplishes nothing permanent, leading them to continually pursue the same goal. So both literally and metaphorically,

they're beating a dead horse.