Runecraft, often called Runecrafting, is a skill that allows players to craft their own runes for Magic spells. In the Runecraft skill, magical runes are crafted by binding the magical energy from runic altars into magical stones. These stones are called essence.
Essences
Pure Essences
Pure essence can be used to craft air, mind, water, earth, fire, and body runes as well as cosmic, chaos, astral, nature, law, death, blood.
Obtaining
Pure essence can be acquired by mining, from monster drops and Loot chest.
Abyss
The Abyss is a special region. The Abyss provides access to all the runic altars without the need for a talisman, with the exception of astral runes.
Essence pouches
Essence pouches are bags that can hold varying amounts of pure essence when training the skill. Essence pouches are highly prized among runecrafters because they can be used to take larger loads when runecrafting and mining pure essence.
Essence pouches are bought with skill tickets at ????, You can find this NPC south of the thieving stalls at ::sz or skilling zone in Teleportation menu > Skilling > Skilling Zone.