To me the most exciting part of Runescape comes from greater knowledge of the game and a deeper understanding of it’s mechanics. Runescape is an example of agglutinative design, where new content is introduced frequently, with varying degrees of fanfare from the players. Oftentimes new content is unattractive to high leveled players, or sometimes just dead on arrival when there is no audience in particular which finds it interesting or useful. Having a self restricted account is a real game changer, making a lot of obscure training methods or overlooked item spawns a lot more appealing. I want to take a few minutes to illustrate how to acquire an onyx in most regions of the game. The obvious way on a main account is to buy one from the grand exchange. On an ironman the options are to buy one with Tokkul, get it as a drop from a number of different monsters, or to transmute one from onyx dust, which is available from monster drops, or as a reward from Ancient Caskets found during archeology. Then there are more obscure methods though, like this one which requires just the player owned house, and an impling spawn.
The aquarium is an easily overlooked room in the player owned house, but one which is very valuable for the area or drop restricted player. The oyster in the aquarium can give uncut gems, which includes the onyx at a 2/2760 rate, although the number might be a little off as it was derived empirically. This seems like a really low rate, but the player gets five chances a day, which helps. Restricted accounts can be slow in the progress front, but sometimes that is the point. To be able to dive to open an oyster, the player needs to construct the oyster diving suit, which requires five bronze bars, and a fishbowl. Both of these can be attained directly by catching spirit implings, but bronze bars can be attained easier by mining and smithing in certain regions. An alternative to getting the fishbowl is to craft one, which requires molten glass, which requires a bucket of sand, and soda ash, which requires seaweed to be cooked on a range. Seaweed can be looted from various spawns, especially those on the coastlines, drops from a few different monsters, or can be acquired from a baby impling. Buckets of sand can be gathered by using a bucket on one of a few sand pits in the game, as drops from a few different monsters, most of which live in the desert, or be acquired by catching earth implings. Combine the soda ash and buckets of sand at a furnace to make molten glass, then blow into a fishbowl. With 63 level construction use the bronze bars and fishbowl to make the oyster diving suit in the aquarium room in the player owned house, then loot the oysters daily for gems, eventually getting an uncut onyx. This can technically be done at level three on an ironman account as well, for getting a non combat onyx.
The game is filled with this sort of overlooked information and techniques, and I intend on exploring and theory crafting my way through the game, and maybe even set off on my own ironman adventures when I get a chance. That being said, the onyx might actually be the easier part in acquiring an amulet of fury, because the mining and smithing rework completely shifts the restricted ironman metagame from Old School Runescape.