Off-hand steel knife

Ironman verdict

At least 7 monsters drop it. The easiest is Zombie (Lair of Tarn Razorlor) (level 72, 5/256); the best rate is Skeleton warlord (level 91), at 3/246, about one every 8 kills. You can also make it yourself: it takes 20 Smithing and gives 75 Smithing XP, using Steel bar. Making ten takes 10 × Steel bar and gives 750 Smithing XP. Reaching level 20 Smithing takes 4,470 XP in total; the Smithing calculator counts the actions and materials to any target, and the Smithing guide has the Ironman training route. It is worn in the off-hand weapon slot at tier 20 as ranged gear; compare it with every other piece on the Off-hand weapons list. Off-hand steel knife is available on free-to-play worlds too. It is tradeable on normal accounts, but an Ironman cannot use the Grand Exchange or trade for it, so the sources on this page are the whole list. High Alchemy turns one into 5 coins, which is 85 less than the shop price, so buying it to alch does not pay.