Shadowsteel Datapack
This pack adds a tier of tools above Netherite (unforunately only pickaxe and sword for now), called Shadowsteel.

These tools can be crafted in a smithing table with a shadowsteel ingot and a netherite tool (which keeps enchantments and names)

The shadowsteel ingot has a fairly large crafting tree, and is crafted by dropping the 4 required items on a sculk shrieker in an ancient city, in a deep dark biome.

The items needed are:
1 Filled Darkness Flask
1 Wither Rose
1 Iron Ingot
1 Void Chunk

You can craft an Empty Darkness Flask with two netherite scraps and a glass bottle in a crafting table (shapeless), and you can fill it by right clicking in complete darkness under y=0. You can obtain a Void Chunk by throwing netherite into the void in the Overworld. To open the void, you need to craft the Worldbreaker, which needs a netherite axe in the middle, two popped chorus on the sides, and a nether star and a bone to the top and bottom respectively.

The Shadowsteel Pickaxe, when enchanted with efficiency 5, can instamine deepslate, and the Shadowsteel Sword can oneshot most mobs (but is balanced)

This pack is not 100% completed but works for now.

IMPORTANT WARNING: WHEN SMITHING SHADOWSTEEL TOOLS, SHIFT CLICK THE OUTPUT CRAFTING PACKAGE, OR YOU WILL LOSE YOUR TOOL (bug)

Thank you for downloading, and I hope you enjoy :)