Ivar was a dwarf located at the Artisans' Workshop who talked about starlight ore and starfire weaponry. He was able to explain about the ore, exchange any for Mining or Smithing experience (only a maximum of 20,000 ore could be given to him per day for either Smithing or Mining experience) or exchange 10,000 ores and the necessary blueprints for starfire weapons (or starfury if a starlight diamond is brought to him). Ivar claimed to have seen a Shooting Star become a meteorite when plummeting towards Gielinor and releasing lots of starlight ore while doing so. He quickly made some blueprints for weapons that could be made, but he was assaulted on his way home, and now needs adventurers to find them.
The blueprints could be found as a drop from monsters, the ores and diamonds from mining. All of them could also be found on the Squeal of Fortune.