Waterskin (4)

Ironman verdict

At least 7 monsters drop it. The easiest is Small lizard (level 21, 1/128); the best rate is Desert strykewyrm (level 103), at 14/101, about one every 4 kills. You can also make it yourself: it takes 68 Magic and gives 65 Magic XP, using 28 × Waterskin (0), Fire rune, 3 × Water rune and Astral rune. There are 2 other recipes below. Other sources include Dung kalphite, Bandit king and Menaphos market guard. Making ten takes 280 × Waterskin (0), 10 × Fire rune, 30 × Water rune and 10 × Astral rune and gives 650 Magic XP. Reaching level 68 Magic takes 605,032 XP in total; the Magic calculator counts the actions and materials to any target, and the Magic guide has the Ironman training route. Waterskin (4) is members-only. 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 18 coins, which is 12 less than the shop price, so buying it to alch does not pay.