I'll go over some basics here but I've included three new guides in the handbook going over stuff in more detail. You should give them a read if you need help.

New worldgen- Mystic ore is a new ore found rarely near the mantle in the deepths of the world, it produces a strange clockwork-like sound so you can find it easier when your nearby, mystic ore does not show up when prospecting so you will need to dig around in the dangerous depths while keeping an ear out for its signature sound.

3x3 Tools- Stronger metals means stronger tools, blacksteel and better metals can be created into powerful 3x3 mining tools like the hammer or excavator. Despite a general slower mining speed these tools can dig large tunnels far faster than a pickaxe but they cant mine as many total blocks as one. Legendary metal hammers need a special set of parts to create.

More anvils- While blacksteel and crysteel can be forged into tools on a steel anvil, you will need a blacksteel anvil to work red and blue steel. You will eventually need to make a red/blue steel anvil so you can forge the legendary metals. These anvils are far easier to craft and can be reclaimed with a chisel.

Standard tools and armor- All these new metals can be forged into vanilla things like pickaxes, axes, saws, hammers, shovels, shears, brigantine, chainmail, plate, scalemail and more. The only thing you cant make that might be added later on is spears and arrows if I can figure out how to make custom entities of these items. Armor recipes are based off of the armor crafting rebalance mod I have made, these recipes make more sense than vanillas and this mod is balanced to use these recipes.

New fuels/alloys- To make these new metals you will need to alloy them from other metals/materials. Because of this, there are two new fuel types able to melt steel and beyond. Blacksteel needs to be carbonated via a cementation furnace before you can use it so you may want to build a few of those to expand your production. I might eventually add more cementation furnace useage, or even unique multi-blocks if needed. Also adds the ability to smelt down nickel and magnesium to ingots for some alloys.

Nuggets- I've added tons of new nuggets for vanilla and this mods metals, this is for convenience when creating all these alloys, they have the same metal value as a normal nugget at 5 units and the recipe is 1:1 so you can smelt them back down to an ingot. They can be made with a chisel and the ingot you want to break down.

Blacksteel (tier 5)-

Blacksteel is a very basic metal, its better than steel in every way. Armor made from any mystical metal offers far fewer restrictions than vanilla overall and is tuned to be different for each metal.

Crysteel (tier 6)-

Crysteel is an interesting "metal" that while in the same tier as the better steels it only needs a tier 4 anvil to smith like blacksteel, it has some fillers in it so its a good way to stretch your blacksteel supply, due to its properties it is unable to be made into armor and has less durability than blacksteel but it mines faster and does more damage.

Redsteel (tier 6)-

Redsteel is a very dense metal, its super strong and gear made from it have lots of durability and will protect you very well. Unfortunately its also very heavy so your tools will mine slower than bluesteel and armor will hinder your mobility greatly.

Bluesteel (tier 6)-

Bluesteel is unnaturally lightweight so tools made from it will mine really fast, its also great at making armor that barely hinders you, gear will have slightly less durability/protection than redsteel.

Adamantite (tier 7)-

Adamantite has incredible strength and gear made from it has insane durability and protection, it is very very heavy though so you wont be able to move or mine as fast with it. As an example adamantite plate armor will slow you down by 30%, but all types of armors made from it get a high tier damage resistance bonus.

Mithril (tier 7)-

Mithril is a metal incredible in its own right, its so lightweight that ingots of it will float on water! Gear made from this metal offer the fastest mining speed and even its plate armor will only slow you down by just 9%! Its not nearly as durable or protective as adamantite though and does not get a high tier damage resistance on scale and below.

Vinarium (tier 7)-

This super-metal is the result of mixing adamantite and mithril, its the ultimate alloy in the fact that it borrows properties from its components, items made from it are the most durable yet and also offer insane protection, the only catch is that its slightly heaver than mithril so its plate armor slows you down by 15%, but all types of armors made from it get a high tier damage resistance bonus.

Metal textures:

Order- blacksteel, crysteel, redsteel, bluesteel, adamantite, mithril, vinarium.