After the third pair of wizards have come out (Happens around 70% transmatting), for the love of all that is holy, step out of the zone.
Sincerely,
Everyone who knows how to turn the public event heroic
Edit: Killing the shriekers is what triggers the heroic event. If the transmat progresses enough, the shrieker basically opens and closes almost straightaway.
English
#destiny2
-
I'm gonna guess you haven't heard this, the shriekers aren't supposed to close up at 70%. It is a bug thats making them close up like that.