The Altar of Mythal is a site of worship for the elven god Mythal. While the nearby Temple of Mythal was dedicated to Mythal's role as a servant of justice, this altar seems to have been used as the site where the ancient Elves communicated directly with the goddess.
Involvement
The Altar of Mythal is only accessible during the quest The Final Piece if the Inquisitor chooses to drink from the Well of Sorrows or if Morrigan drinks and Kieran does not exist or does not carry the soul of Urthemiel
After communing with the Altar, a High dragon will be summoned: the Guardian of Mythal.
Map of the Area