Crafting Law Rune becomes unlocked upon attaining Runecrafting level 52. You must complete your Troll Stronghold quest (required skill levels 15 Agility, 30, Thieving, 43 Prayer) for the chance to get Law Talisman granting access to RuneScape gold Law Altar.
Once you've finished that, you are good to Once you've done that, you're good to. Law Altar can be accessed either directly via a journey through the northern parts of Entrana or via Abyss. There are also those who use balloon transportation. Three options are feasible. The decision is up to you. Law Rune scales with Runecrafting similar to Astral Rune, at 95 crafting levels, output gets doubled.
There's only one prerequisite for crafting Nature Runes - Runecrafting level 44, upon reaching level 91 players can create two. As with the others, it is made at the right - Nature - altar, situated northeast of Shilo Village while wearing Nature talisman (or cheap RS gold it can be accessed through Abyss).