First I love the purge it’s so much fun and it brings resources and thralls straight to your door. It’s like a free delivery service. I’m going to dribble on for a bit here hopefully it will be helpful it certainly won’t be succinct lol.
@Catspaw I’m guessing you are playing on an official server if so this would apply to you.
Check your server setting for purge times. Most official are from 6p - 10p in whatever time zone the server is on. I play on an east coast server so it comes between 4p - 8p local time.
Warnings only come when you are getting purged and you have 10 minutes to prepare. Once that 10 minutes is up you have your first wave. Be aware that if you teleport during the count down your timer may be wrong, there’s a bug where the timer restarts when you use the map. The purge can last up to 45 minutes. The purge is set to 7 so you can receive level 1-7. One being the least difficult and 7 being the most difficult. I love 7’s they are tons of fun.
Offline purges can happen when you log out before purge time is over and you have crossed the first line. The server will randomly select clans to be purged based on eligibility (the first line in the meter) if you’re the only one eligible you’ll get the purge right away.
When you cross the first line you should plan to stay online during the purge time so that you can defend your base and gain all the glory of crush the various waves of purge enemies.
Locations can send you higher tier purges but you are always eligible to get a low level purge in a high level place.
The faster you kill the waves the more waves you can get. This is extremely useful when you get a purge where NPC’s come because you have more chances to spawn named NPC’s. Between wave you get a 1 minute count down to regroup and hopefully move thralls to the wheel.
Spawn areas can be a bit buggy. When you see a wave spawn try to vacate that area before your 1 minute timer runs out. The hope is that the server chooses that place to spawn the next wave. If you’re standing there it will likely spawn somewhere else.
Spawning inside bases is a real thing so be prepared for it. I have fought 7 waves of thralls on my roof as well as monsters in one of my building in the volcano.
Here’s a link to my roof purge. https://youtu.be/fIDCkXM4GsY
Be prepared for anything I have fought everything from imps to king crocs, undead dragons, baby dragons followed by the frost dragon. The frost dragon was one of my favs.