Key of the Decayed Soul

Overview[]

Chapter 15: The Core
- On the corpse of a ninja atop the Stairway to the Imperial Palace, alongside Dai's Diary.

Ninja Gaiden: Items
Health Items	Elixir of Spiritual Life • Great Spirit Elixir • Life of the Gods • Lives of the Thousand Gods • The Talisman of Rebirth • Ayane's Rations • Ayane's Ration Bundle
Ninpo Items	Elixir of the Devil Way • Great Devil Elixir • Jewel of the Demon Seal • Spirit of the Devils • Fragrance of Dayflower • Fragrance of Hydrangea
Miscellanea	Arrows • APFSDS Cores • Explosive Arrows • Golden Scarab • Jewel of the Spirit Smith • Ninja Gaiden
Key Items	Fangs of the Samurai • Key of Courage • Statue Head • Wing Key • ID Card • Stone Tablet (Top) • Han's Bar Party Ticket • Lily Key • Key of Pegasus • Stone Tablet (Right) • Raptor, Deity of Sentiment • Book of the Eons • Holy Grail • Wolf, Deity of Widsom • Skull Key • Warehouse Key • Shutter Control Card Key • Control Room Key • Key of the Insect • Red Tablet of the Stream • Statue of the Water Spirit • Blue Tablet of the Stream • Brand of Valor • Gold Medallion • Owl's Eye • Hand Crank • Oxygen Cylinder • Silver Medallion • Shield of Vigoor • Stone Tablet (Left) • Iron Ore • Cog of Vigoor • Eye of Ice • Eye of Flame • Devil, Deity of Immorality • Tablet of Water • Tablet of Flame • Tablet of Leaves • Serpent, Deity of Creation • Griffon Key • Key of the Lion • Key of the Lioness • Key of the Decayed Soul • Demon, Deity of Destruction