... Ooh, have you heard of CHEW, or Do I Have A Comic For You? (Note: considerably less SFW than yours; lots of black humor... but, if you like those things, really funny. I have not finished the last volume, though.) But anyway, I love this!!! Is it possible that there are hidden Life Springs that just. Nobody's been assigned to yet?
yoooo thank you! Natural ones? Nope. Legend has it that way in the past there were more of them, but if they existed they're gone now. As for artificial ones? Insanely difficult to create, but definitely not impossible. Theoretically the cannibals could have created more than the one we'll eventually see, but it's not likely--the cannibal population mostly stays on their own turf, and if they have bothered to pop another one up somewhere, nobody's found it.