Buy RS3 Primed glorious bar
The Primed glorious bar is a members only metal bar in RuneScape 3. It is a key material for making the masterwork 2h sword. Each bar is primed in the finest primal metal, and you need 10 of them to make one full sword.
Making these bars yourself takes a lot of work. Each one is smelted at a furnace from 1 glorious bar and 100 primal bars, and you need Smithing level 110. Buying them saves you all that smelting time and materials.
With Smithing level 110, you can use these bars at an anvil to make the parts of the masterwork sword. These parts include the masterwork cross guard centre piece, sword pommel, sword quillon, unfinished masterwork blade, and unwrapped masterwork sword grip. Some parts also need gold bars, and the cross guard centre piece needs a faceted chaos-infused moonstone.
Primed glorious bars are tradeable and noteable, and they can be stored in and used through the metal bank. They are not stackable, cannot be equipped, and cannot be disassembled or alchemised. Grab a set of 10 and you have the bars needed for a full masterwork 2h sword.