This mod adds new ores such as steel, sulfur, tin and ruby.

It also has an underworld of which contains all of the new nether biomes introduced in 1.16.

It is also a backport mod. This mod adds:

.Powder snow
.Copper and all of it's varients
.Netherite and nether gold
.Blackstone and basalt and soul soil
.Pigstep
.Amethyst
.Tuff and calcite (found in amethyst geodes)
.smithing table

This mod also contains a charming table in which you can do amethyst magic!