Spectral Mod adds a new Steel material that can be obtained by melting iron ingots, and already from it you can create an improved version of dark steel in the potion maker when using the Nezer star.
The mod also adds new weapons such as an upgraded sword, battle axe, knife, spear.
Dark steel items give experience when used, and the sword of experience gives 3 times more experience from mobs.
the mod also adds bows:
to view the crafts, use JEI, the mod is also compatible with BetterCombat