Medieval rabbit

"Blue Star 4.0 will begin its maintenance-free update at 12:00 AM on April 1st. The main content and adjustments of this update are as follows."
"New monthly rule 'Active Talent' added: All players must converse with others for a total of 1000 sentences every day..."
When an abrupt notification sound echoed in the ears of all humans on Blue Star.
The world faced its cleansing.
In every monthly version update, a new rule would descend, which all players had to obey.
...
Chen Yi, who had found a massive loophole before the third version update, looked at the six-figure Points Balance in his account and broke into a grin.
"Tuberculosis Rabbit, this time we might just rise to the top."

There is One New Rule Every Month Globally

"System Notification: 'Santa Claus' 9 reindeer have stolen Santa Claus' gift box and have fled back to the 'past' to secretly sell them."


"You've apprehended one of Santa's reindeer, No. 2378; now, the remaining eight reindeer have run back to squeal on you."


"Now Santa Claus is on his way to kill you."


"Countdown to Santa Claus' arrival: 09:22:21"


"1: 'Santa Claus' is the neutral boss of December. Except when he or his reindeer are attacked or captured, he won't hurt any player, but his strength is equivalent to that of December's boss and far beyond the abilities of players in May."


"2: 'Santa Claus' can only act at night and cannot move during the day."


"3: Santa Claus can stay in the past for a maximum of 24 hours. If players survive for 24 hours, Santa Claus will return empty-handed."


Chapter 43: "I want the December Christmas event to have no Santa Claus anymore!!!