Deepborn

Deepborn is a mod that adds content to various parts of the game, mostly focused on cave exploration. It features several strange new biomes and structures to explore, new enemies to fight, and several new ores. Dig deep enough, and you'll stumble into the Abyss, a cold and lifeless cave dimension directly under the overworld. Ores may be found in great quantities, but beware of sticky tar pits and the dangerous things lurking in the darkness.

This is my first mod, so I hope you enjoy!