A Mysterious ruin is a large, glowing stone slab surrounded by pillars. They are essentially doorways used to travel from Gielinor to the pocket dimension at which runecrafting actually takes place. Entry to each altar requires a specific talisman, tiara or talisman stave which functions as something of a key or trigger which transports the player to the altars.By ’Using’ a talisman on a Mysterious ruin, players will be transported directly to the runecrafting altar within a landscape related to its theme. Other ways to enter involve wielding a staff or tiara, saving one inventory space. A small portal on the floor near the altar provides transportation back to Gielinor.
Both the Ourania and Astral altars can be accessed without use of a talisman or related accessories. These two altars have no Mysterious Ruins at their entrance, instead being simply the altar itself.
There is one alternative method to gain access to all but the Ourania and Astral altars directly, circumventing the mysterious ruins entirely, via usage of the Abyss.
To enter a Runecrafting Altar you must have either a Talisman that matches the current altar you are trying to enter, then click Use and then on the Altar. Alternatively you can use a Tiara or the Wicked Hood infused with the power of a Talisman. The Tiara or Wicked Hood is recommended because equipping it saves an inventory space. It allows entry into the Altar with one click. Altars can also be teleported to through the special ability of the Wicked Hood and/or using pre-made teleport tabs from The Great Orb Project minigame. Talisman staves may also be obtained from this minigame. These work the same way as Tiaras but can also be used as a weak melee weapon.
Each altar has an individual mysterious ruins which reacts only with the corresponding talisman. For example, use of an Air Talisman is needed to enter the Air Altar, whereas attempting to use a Water Talisman on the Air Altar will not produce any result at all. Talismans can be used on altars to create tiaras and staves. Some types of talisman are harder to obtain, and can cost quite a lot of money on the Grand Exchange. However, tiaras are often cheaper as creating tiaras is a way to earn Runecrafting experience.