The Key of Symbiosis is an item in The Messenger. It is a purple Music Note found in the Elemental Skylands. Ninja must brave the Dark Cave to reach Rivière Turquoise, then clear the level in order to receive the Magic Firefly. The Magic Firefly is then used to cure Monk in 8-bit Quillshroom Marsh; Monk then takes her leave to 8-bit Glacial Peak where, after she's spoken to, she breaks the ice off of the ice-encased lanterns. Ninja can then return to the room in 16-bit in order to free Manfred who takes him to Elemental Skylands. After traversing through Elemental Skylands and defeating the Clockwork Concierge, Ninja is given the Music Note.
|Items in The Messenger|
|Items||Scroll • Climbing Claws • Energy Shuriken • Windmill Shuriken • Wingsuit • Rope Dart • Lightfoot Tabi • Astral Seed • Astral Tea Leaves • Ordinary Wax Candle • Magic Seashell • Power Thistle • Demon Crown • Ruxxtin's Amulet • Magic Firefly • Sun and Moon Crests|
|Abilities||Cloudstep • Shop Upgrades|
|Collectibles||Power Seals • Voodoo Feathers • Voodoo Mask Pieces|
|Music Notes||Key of Chaos • Key of Hope • Key of Courage • Key of Love • Key of Symbiosis • Key of Strength|
|Phobekins||Acro • Necro • Claustro • Pyro|
|Miscellaneous||Time Shards • Money Wrench|