Bluemoon

Choosing your faction:
For vampires: Get yourself bitten by vampire or a certain fang item and obtain a debuff called “Vampiris Sanguiem” and wait for the timer to run out.
For werewolves: Get bitten by werewolves and obtain a debuff called “Lupus Sanguiem” and sleep through the night.

For hunters: Find some garlic, make a syringe with it, (right click a certain chair from vampire hunter trainers that sometimes spawn on villages).
Levelling up:
After becoming one of those, check your inventory menu with a fang icon, the player should be able to see their skills from there OR set a keybind in their controls setting.
To get skills, the player must obtain skill points which is done through levelling up on their respective altars. I would not go with the specifics on how to build it and how it works but its better to read through the wiki of the Vampirism and Werewolves mods.

– Discover new mechanics based on your choice.
– Each faction can control a village which can be challenged, raid style.
– Each of these factions have a different set of skills and playstyle.
– Vampires and Werewolves have their own biomes.
– Vampires and Hunters naturally spawn around the world.
– Hordes of werewolves will spawn every now and then. Be prepared.
– There are also rpg mods. Expect illager raids to challenging as well.
– Lots of Dungeons and structures to explore!
– Lots of optimization mods carefully selected to get the best performance.
– There are some quality of life mods also thrown into the mix along with vanilla enhancing mods. If you do not want to choose a faction, you are free to do so and go full vanilla and enjoy the other mods.
– I cannot accommodate the difficulty bar GUI into every screen size, so I recommend just changing its x,y GUI position in the config->improvedmobs->client. It will be tedious since you will have to restart the game everytime you change that to save the changes.