[Holes] 22 [Location] Hyrule Castle [Requirements] "Song of Storms" [Directions and Notes] 
As a child, go back to where you met Talon for the first time at Hyrule Castle, turn around and there should be a lone tree, and when you get near the Shard of Agony should react. Use the Song of Storms and the hole should appear. Inside is a Gold Skulluta, bugs, and a Gossip Stone.