A mod that generate the underground world adding many layers below 0Y. You can dig your way to the Core of the planet! There are enormous cave system to explore.
Important: In order to generate the world with the mantle and the core, you must select world type:Planetcore when creating a new world.
Be prepared mentally because this mod is time consuming to reach the core in survival.
Planetcore add many layers underground where you can dig all the way to the core and inside, located below 4800 blocks deep. Each layer are 256 blocks deep and consist of a new rock tier with more valuable ores. You need to find the best ores in each layer and craft a better pickaxe in order to break the next rock tier.
Some important tips First thing you need to gather crustrock, found at around -64Y to craft a crustrock furnace. Crustrock will be indestructible but you can gather them with TNT. You can gather sulfur ore and combine them with coal to get gunpowder.
Then you can smelt steel ingot by combining 1 coal and 1 iron ore in crustrock furnace. You need to craft a steel furnace by combining 8 steel blocks just like normal furnace recipe. Steel furnace allow you to smelt bronze by combining 1 tin and 1 copper. To activate the furnace, you need iron lava bucket.
Bronze pickaxe can harvest silver ore. Silver pickaxe can harvest gold ore. Gold pickaxe can harvest diamond ore. Diamond pick enchanted with efficiency III can harvest titanium ore.
Then you just need the next tier tool to break the next tier ore all the way to Onyx tools.
When you reach Onyx, you can upgrade to Onyx II by surrounding the tool with 8 painite gem. Onyx III and above need 4 Onyx of the lower tier to craft them. Example: 4 Onyx II to craft 1 Onyx III.
Tip: You can use enchantment such as efficiency and relentless to help you break the next rock tier. Relentless is a measurement of how long you take to break a block before it become indestructible. Relentless of 3 means that if your pickaxe take more than 3 seconds to break a block, the block is indestructible. I also added haste II and III potions to help you mine faster.
There is a pressure effect going on in the planet where the rock close on itself. The deeper, the faster the pressure happen. You will also burn if you are too deep. You can use fire resistance to help you. I added fire resistance II and III potions which are needed to go deeper. Beware of diamond and other gem lava as they hurt you from a distance. Also beware of gas pocket! Sometimes when you destroy a rock, it explode. The deeper you are, the more frequently this happen and the explosions are bigger. This only occur in mantlerock and below.
Types of ores
You can find small ores that gives shards that you can combine to make normal ores or gems. You find the normal ores and then there are compact ores and supercompact ores. Supercompact ores are indestructible until you get a high tier pickaxe.
First, you can craft normal pickaxe like usual. Then you can craft complete pickaxes that have more durability. You need to craft a rod by placing 2 ingot or gem on top of each others then craft a pickaxe using the rod instead of a stick. This apply for all metal tools. All gems tools are like the complete pickaxe, they can only be crafted with rods except for diamond tools.
Caves and ravines
You will find large caves to explore with demons and other monsters lurking somewhere. You can find caves made of supercompact ores. I made ravines larger. Ravines will generate more or less lava randomly, but deeper they are usually filled up. Deeper ravines contain iron lava, in the core it contain core lava and deeper than that they contain onyx lava.
I am currently working on a new version where you can find vanilla diamond before the crustrock layer because in the current version, you can only find my modded diamond that is located in the lower mantle. In the new version, you need to get diamond pick to mine crustrock (the first layer). To mine diamond ore you will need a golden pick. To get gold ore you need silver pick, for silver ore you need bronze pick, to get bronze pick, you need tin and copper smelted in a steel furnace. I remove current modded diamond in my mod. I will also delete all planetcore iron and planetcore gold. The mod will use vanilla stuff instead. I am also deleting 10 layers of mantlerocks. Be aware that the game can crash if you have mantlerock6 and above generated in your world and you download the next planetcore version. This is because I removed them while they don't disappear in the game. If that's the case and you want to download the next version, I recommend deleting all your region files that are below -1024Y to be safe and removing every mantlerock6 and above from your chests and inventory before upgrading to the next planetcore version. If you need help, come to my discord.