Sunny's Cave Pack

This is a light pack which has 3 main aspects, spelunking, blood moons, and space exploration. 

There are various underground biomes as well as new overworld terrain to explore.

Lunar cycles add blood moons, harvest moons, and more to spice up base defense, different types of spikes can also be made to assist.

Finally, players can explore space with Ad Astra, which adds a variety of planets to explore (basically just our solar system)

Also this mod includes Silent Gear, which is the 1.20 equivalent of tinkers construct though watered down a bit for easier use.

Have fun!