"...it turns out the only mention of the word 'Kedavra' is from the three unforgivable curses in Harry Potter universe. Namely the one that causes death to the one it's cast on. And Doloris is derived from the Spanish dolores, which means sorrow or aches."
Also the defense of dark arts teacher in _Order of the Phoenix_ (where the Killing Curse is mentioned) is Delores Umbridge. I'm pretty sure the mission in an homage to Harry Potter. Upon which Kenny Cr was based, and his ability is life gain. Either a remarkable coincidence, or the staff at UR are enjoying a complicated word game.