Buy RS3 Nature rune
Nature runes are catalytic runes in RuneScape 3. Players use them for transmutation and binding spells. They are stackable, tradeable, and weigh nothing, so a full stack fits in one inventory slot.
The most common use is High Level Alchemy. This spell turns items into a set amount of coins and gives strong Magic experience with no risk of death or damage. Nature runes also power Low Level Alchemy and Superheat Item, which heats a smithing item without stopping the process.
These runes have more uses too. With earth and water runes, they cast Bones to Bananas and Bones to Peaches, which turn carried bones into food. They also cast Bind, Snare, and Entangle to hold a target in place. On the Lunar spellbook, they are needed for the Plank Make spell.
Crafting nature runes yourself takes level 44 Runecrafting, a nature talisman, and pure essence at the nature altar. Level 91 is needed to always craft two runes per essence. Buying a stack of nature runes skips all that work, so players can train Magic, alch items for coins, or make planks right away.