The Daring of the Giants is a Key Item in Xenoblade Chronicles. It is one of the three Giants' key items found, the other two being the Truth of the Giants and the Heart of the Giants. These three items are required to open the door at Three Sage Summit, and are required for The Giants' Treasures and The Final Giants' Ruins.
To obtain the Daring of the Giants, a chain of quests in Satorl Marsh must be completed: Kacha's Kidnapping, The Giants' Key and The Giants' Treasure.