Originally Posted by Zandel

? - 5 Spawned an event specific SG basic that dropped 30 tickets that you couldn't miss. It was 25 stam to run. Have not seen any other SGs yet as I was farming Blue drags to evolve my Hanamomo-chan. I got lucky and managed to get 6 x gold drags but it did take me all of today's stam.

They all spawned SGs for me, but only the ?-5 one was event specific. However, I bet it's random, and that each may spawn an event specific SG. Though ?-8 spawns plenty of papers, so I don't think it's really necessary for that one. But for the people who can't clear all event maps yet, ?-5 is definitely a nice one to farm and keep up with the high level crowd (somewhat).