Update Note:
In this update, @stumper66 has kindly worked on an assortment of fixes and improvements to LevelledMobs to improve your experience!
Simply replace the new version from the old into your plugins folder, and (re)start your server. LevelledMobs will handle any file changes automatically.
Reminder: if you need assistance, or have a question, issue or suggestion with LevelledMobs, you can reach out to us on our Discord Server.

We're fueled by your support:
LevelledMobs is provided as 'premium' quality by our team, completely free of charge to you. This includes the working plugin file, the full source code, and some of the best support provided on the platform. This takes hours and hours of our free time. Please help us keep LevelledMobs free by supporting our work.
Here are some of the ways you can support LevelledMobs and its team:

• Donate to @stumper66 (aka PenalBuffalo), who programmed this entire update, and who has been maintaining LevelledMobs 3.
  • Donate on Ko-fi
  • Donate on PayPal: [email protected]
  • (Donators are eligible to receive roles on our Discord )
• Post a review on our Spigot resource page in the reviews section, with however much or little detail you wish to include. It's highly appreciated. <3
  
• Star our GitHub repository.
• Share it to whoever may be interested!

Full Changelog:

• fix for potential server crash with callstack me.lokka30.levelledmobs.listeners.PlayerJoinListener.onJoin(PlayerJoinListener.java:48)
• updated /lm spawner create command to have optional argument /giveplayer (playername). When this arugment is used then the sender isn't required to be a player (can be command block, console, etc)
• added two new arguments to the /lm spawner create command: /nolore and /lore "This is some custom lore"
• in rules.yml modallists can now use a simple syntax, such as worlds: ['world_1', 'world_2'] or worlds: '*'
• fixed command /lm spawner create not parsing the command properly when two separate arguments with quotes are used
• fixed command /lm spawner create not colorizing custom names
• added new misc-debug value: ATTRIBUTE_MULTIPLIERS
• made small changes in messages.yml, courtesy of @UltimaOath
• added fix for potential exceptions
• added new placeholder: %health-percent% - a integer representing a mob's remaining health in percent
• fixed more exception related issues
• added nbt data option to /lm summon command, example: /lm summon 1 husk 5 here {NoAI:1}

Thank you all very much!