Draconic flutes are a Guild Technology that can be used to summon random dragons of varying rarity inside a Draconic Sanctuary. As can be inferred, the player needs to be part of a Guild with both the Draconic Resonance and Draconic Sanctuary unlocked to be able to gather and use flutes. The higher the Draconic Resonance level, the higher chance there is of obtaining rare flutes. The Enhanced Extraction technology is also beneficial here, but not required.