I was told and found in my limited research that we could buy the opal monster sets from past events with 5 event tickets during an event. I understood it as any event where the event ticket lady was out. I am not seeing them though so I guess this is not the case and I was misinformed? I was on a 2 year break and missed out on the EG shoulders and was just trying to settle for the opals where I could purchase them next event (the current MYM event).