Shark

Ironman verdict

At least 9 monsters drop it. The easiest is Spiritual warrior (level 49, 12/128); the best rate is Kalphite King (level 2,500), at 35/128, about 14 per kill. You can also make it yourself: it takes 80 Cooking and gives 210 Cooking XP, using Raw shark. There are 2 other recipes below. Other sources include Gourmet impling, Gourmet impling jar, The Barrows Brothers and Pirate impling, plus 4 more listed below. Making ten takes 10 × Raw shark and gives 2,100 Cooking XP. Reaching level 80 Cooking takes 1,986,068 XP in total; the Cooking calculator counts the actions and materials to any target, and the Cooking guide has the Ironman training route. 5 recipes use Shark, including Attuned portent of degradation I, Attuned portent of restoration VIII and Calorie bomb (shark). Shark 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 180 coins, which is 120 less than the shop price, so buying it to alch does not pay.