...Razors?
Like, it'd be a throwing weapon similar to Light Disk or a few other boomerang weapons.
Except they'd be made out of ores, and each ore made a different type of Razor.
Copper, Tin, Iron, Lead, and so on until Luminite. Where the Luminite ones can be combined with fragments from the 4 pillars to make "Solar Razor, Vortex Razor, Nebula Razor, or Stardust Razor", each with their own special effects.
But the point is to be more of a throwing weapon thing, because throwing weapons don't get all that much late game love. Not even their own pillar despite being one of the 5 attack types.
But how Razors would work is that each type is thrown (obviously), and affected by gravity, upon hitting solid ground, they'd slide a bit, so like, you throw them up, they'd go in an arch, and travel upon the ground in the direction they're thrown. (Example, you throw one left, it'd travel left and up upon hitting a ground, then go down upon hitting the next wall.
This weapon type is stackable, being ammo reliant, similar to other throwing weapons. May not sound like the best of ideas, but it'd expand the throwing class a bit.
Special Razor Types
Cursed Razors (100 Palladium/Cobalt+1 Cursed Flame) Any Anvil
Ichor Razors (100 Palladium/Cobalt+1 Ichor) Any Anvil
Shroomite Razors (50 Chlorophyte Razors+15 Glowing Mushrooms) Autohammer
Digital Razors (50 Chlorophyte Razors+25 Nanites) Hardmode Forge
Super Golden Razors (77 Gold Razors+7 Gold Dust) Any Anvil (Mainly just a little dps, why not make things extra sparkly? Easily Outclassed and mainly for fun) Anvil
Toxic Razors (80 Iron/Lead Razors+1 Flask of Poison) Imbuing Station
Venomous Razors (80 Hallowed Razors+1 Flask of Venom) Imbuing Station
Solar Razor (50 Luminite Razors+1 Solar Fragment) Ancient Manipulator
Vortex Razor (50 Luminite Razors+Vortex Fragment) Ancient Manipulator
Nebula Razor ( 50 Luminite Razors+1 Nebula Frgament) Ancient Manipulator
Stardust Razor (50 Luminite Razors+1 Stardust Fragment) Ancient Manipulator
Frost Razor (50 Titanium/Adamantite Razors+1 Frost Core) Hardmode Anvil
Special Razor Effects.
Hellstone-Causes On Fire! upon hit.
Cursed-Causes Cursed Inferno upon hit.
Ichor-Causes Ichor upon hit.
Shroomite-Causes dust clouds upon hit.
Frost-Causes Chilled upon hit.
Digital-Causes Confusion upon hit.
Spectre-Goes through platforms, doors, trapdoors, and 1 block openings, emits light.
Toxic-Causes Poisoned upon hit.
Venom-Causes Venom upon hit.
Super Golden-Causes Midas upon hit.
Solar-Causes an explosion and Daybroken upon hit, emits light.
Vortex-Unaffected by Gravity, emits light. Upon hitting an enemy, causes 2 vortex portals (Like the ones used to summon moths in the pillar) and summons 2 more Vortex Razors, these are merely projections and go through walls while the original gains more speed. (I had to balance this)
Nebula-Nearby enemies draw in the razor(s), causing the razor to fly towards them after they get too close. After it hits ground and another enemy is nearby it, it'll fling itself towards them. So stay away! In pvp, when used, it'll cause the hit player to suffer blindness.
Stardust-Splits into 2 razors upon contact with an enemy, this process can occur up to 7 times total in the razors lifetime. Meaning... 1 becomes 2, 2 becomes 4, 4 to 8, 8 to 16, 16 to 32, 32 to 64, 64 to 128, once it hits 128, the razors despawn upon hitting. The razors decrease in attack power each hit.
Hope you like the idea! (Sorry if the later ones aren't that balanced)