The abyssal charm is a tertiary item used in Summoning. Using a Charming imp, players will get 6 Summoning experience per charm. Although it is not a primary ingredient in Summoning pouches like other charms, the triple charm drop bonus from Familiarisation will increase the drop rate of abyssal charms. However, it is not considered as a charm by spirit gems and not saved when creating summoning pouches.
When making pouches, it is always used with 1 green charm.
It is used to create pouches for the special Beasts of Burden. These special Beasts of Burden are the only ones capable of carrying unnoted rune, pure or impure essence, but cannot hold any other kind of item. There are three: the abyssal parasite, abyssal lurker, and abyssal titan, able to hold 7, 12 and 20 essence respectively. They aid runecrafting by increasing the inventory size of the player, though some are also quite combat capable. They are not allowed onto Entrana and may not be used when law runecrafting, except when teleporting directly to the law altar.
To enter the Abyss, players must ask the Mage of Zamorak to teleport them there. The mage is located just north of Edgeville wandering around level 4-6 Wilderness. The leeches, guardians, and walkers within are all aggressive.