Enchant onyx

The Enchant onyx tablet is an item that can be used by any player to enchant onyx jewellery. Players can create this item on a mahogany demon lectern as long as they have 1 cosmic rune, 20 earth runes, 20 fire runes, and 1 soft clay, and at least level 87 Magic.

This tablet can be made regardless of the player's current spell book.

This can be an efficient, and somewhat cheap, way to level up Magic, providing one owns a Lava battlestaff; the staff will quickly pay for itself.