By 'it', I mean ... the monster we fought from home. It was just called "It". We didn't name it.

[he sighs]

Made sense at the time, but s'a pain in the ass here. Anyway, when we all thought It was dead, we ... made a promise. That if It wasn't dead when the next cycle came around, in 20-something years, we'd come back and fight It again.

[he holds out his left hand, showing off the scar on his palm]

Bill had us all cut our hands, and swear on it.