Rings are pretty useful item in Dark Souls III, Rings grant you unique abilities and many others gives you some benefits that you cannot find on any other type of equipment or spell. Also some of them ca be used only for specific build.
Dark Souls III – Transmute Weapons With Boss Souls Guide
Boss souls are very useful and you will only get them after defeating certain powerful boss in an area. Each great soul can be transposed into two different items, usually weapons, but sometimes spells or rings.
Dark Souls III – All Weapon Skills Details
Dark Souls III – Crash, FPS Drop, Nvidia Texture Issue Fix, Not Enough Memory, Can’t Summon Phantom Error Fix
Hyrule Warriors Legends – Enemies Drops Material Details
After killing any enemy you can find some material from its body, in Hyrule Warriors Legends there are many enemies with, Bronze, Silver and Gold loot. Bronze Materials are the most common, while Gold are the most rare and it’s hard to get. You can use these materials to purchase Potions and Badges from the Bazaar.