Thread:Beneblade2142/@comment-26544499-20200602125555/@comment-26544499-20200604105343

I'm not sure, but it might be missable. As I understand it, a quick look at the code says that: So, with good start of turn event luck, good timing, and/or a sufficiently low number of provinces, I guess it's missable?
 * It's a start of turn event and therefore might be beaten out by other start of turn events.
 * It happens only on turns that are divisible by 4.
 * It stops when there's no Hell Holes left.
 * The game only ever spawns the Hell Holes once, and it spawns a maximum of 10.
 * Hell Holes can only spawn in provinces that you own.
 * Hell Holes apparently have no RNG. Their spawning algorithm just runs through the list of provinces from first to last.