The "Elegy of the Deep" is an ability in Hollow Knight: Silksong that allows the protagonist, Hornet, to enter memories. When certain areas exhibit a darker visual effect and emit portions of Silk, Hornet can play the Elegy of the Deep on the Needolin instrument. After playing it for a few seconds, Hornet's vision darkens, and she collapses, awakening inside the memory. This ability is used to access specific locations such as Lost Verdania. To acquire the Elegy of the Deep, players must complete the Spell Seeker main story quest and obtain the ability from the Snail Shamans after ascending back up from The Abyss in Act 3. Once acquired, players can use the Elegy of the Deep tune to explore memories and special areas related to the game's story. It also plays a role in the Green Prince questline, where playing the Elegy of the Deep for the Green Prince NPC triggers access to his memories and the Lost Verdania region. In summary, Elegy of the Deep is a key ancestral art/ability that unlocks memory travel for exploration and quest progression in Silksong.
