There must be a minimum of 2 players inside the zone to kick off the Public Quest as of changes made to Chaos Descending PQs in 2022. If there are more than 18 players it will start early, disregarding the countdown.
There is no announcement in the Chronoweve that the PQ is starting. The only indication that it has begun is the portal changing color as show in the pictures.
Currently the minimum duration between 2 PQs is 2 hours, with no apparent upper limit.
Note: Reports speak of up to 5+ hours until the start of the next one, see also this forum post by Chrol.
Note: At least for 2022, PQ portal becomes active at 12am/pm, 3am/pm, 6am/pm, 9am/pm PST (11am/pm, 2am/pm, 5am/pm, 8am/pm from Mar 15, 2022). It's open for one hour (or usually 3 PQs in a row) but only characters who haven't done it in the past hour can join.
Note: In 2024, the PQ was every three hours.
Should there be more than one instance open please note that your character is precluded from joining the other instance as it receives a 60 minute lockout timer upon PQ completion, you can however log an alt and participate with that.
You can tell at a glance whether the PQ is available by checking for an additional glow around the portal.
The quest Hunt the Past can also be advanced in here by killing the desert asps, which are not part of the PQ itself.
Upon start there is a 60 minute time limit for completion, should you fail to kill the Ancient Cyclops in that time frame you will be booted back the The Chronoweave and receive no reward. Therefore, if you need more than 15 minutes to finish off all the Desert Madmen, you should abandon the attempt.
Steps[]
To spawn the Ancient Cyclops, follow the suggestions of the camper NPCs.
The first camper talks about desert madmen. Kill all the ^^^ desert madmen.
Killing the respawning ^^ desert madmen that are fought by the NPCs and the dune spiders does not seem to be necessary.
The next camper talks about mummies. Run around to all the spots with tombstones and kill the mummies that spawn from the ground.
Note: The players and not the NPCs have to defeat mummies from all 4 gravesites.
Note: Terrorantula is not killable until NPC "a ranger" gets killed (a warrior shouts "Ranger down!!"). If you attack the spider (or hit with AE) before that happens, it may not kill the ranger in a timely manner which prolongs the whole PQ. If you don't know when, it would be safer to NOT touch the spider at all.
Finally you get to kill the Ancient Cyclops for the PQ reward.