The Ichorium Sword is a weapon added by Thaumic Tinkerer. It does 9 points of damage (4.5 hearts), is unbreakable, and can be upgraded to an Awakened Ichorium Sword.
You discovered how to make tools out of Ichorium. These tools are extremely powerful, even more so than diamond, furthermore, they never break.
For the creation of these tools, mundane sticks aren't enough, you decided to use Silverwood Rods in replacement.