Fire rune

Ironman verdict

At least 9 monsters drop it. The easiest is Giant spider (level 2, 6/128); the best rate is Smoulders, the Revenger (level 152), at Always, about 125 per kill. You can also make it yourself: it takes 14 Runecrafting and gives 7 Runecrafting XP, using Rune essence. There are 2 other recipes below. Other sources include Betty, Essence impling, Essence impling jar and Ourania Runecrafting Altar, plus 4 more listed below. Making ten takes 10 × Rune essence and gives 70 Runecrafting XP. Reaching level 14 Runecrafting takes 2,107 XP in total; the Runecrafting calculator counts the actions and materials to any target, and the Runecrafting guide has the Ironman training route. 118 recipes use Fire rune, including Adamant bar, Admiral pie and Amulet of fury. Fire rune 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 3 coins, which is 14 less than the shop price, so buying it to alch does not pay.