DK's Realism

This modpack adds difficulty into Minecraft by adding temperature, weather and sanity that requires constant attention. It adds various new mobs, visual effects, biomes, and terrain generation all in an attempt to make minecraft more realistic but not ridiculously difficult. It will provide you with a bunch more playtime and exploration time while staying true to Minecraft's core game mechanics.

Credit:

I do not take credit for the creation of any of these mods.

"Spelunker's Charm": https://www.curseforge.com/minecraft/mc-mods/spelunkers-charm-ii/files/4799196