Well, maybe you can explain the circumstance on my server? I believe what you are saying! But I am also experiencing something that suggests it is not so simple.

Here are the conditions on the public server. Every boss has been spawned and killed except The Queen. Every head is banished and the power is available, except the Queen.

Yet, the server has an almost 100% rate of the elder army event, across over 20 successful occurrences of events. I could just be rolling a 6 20 times in a row here but I don't think that is what is happening.

Here are some examples of the server's logs, this is just a sample of a 12 hour segment but its the same almost everyday... almost always the elder events.

04/30/2023 07:04:45: Random event set:army_theelder
04/30/2023 13:59:44: Random event set:army_theelder
04/30/2023 14:46:09: Random event set:army_theelder

This is what the server does for every event. What players are on the server? Almost entirely new xbox players.... Thats why I theorize that the player actually stores a variable as well.

Whats even crazier is that when I play on my main; I trigger the wolf and goblin events...

Thats why, I swear, something else is going on!