Key items are essential for progression, unlocking new areas or solving puzzles. These include various keys, tablets, and crests. Artifacts, on the other hand, provide permanent upgrades to Ryu's stats. Lives of the Gods increase maximum health, while Spirit of the Devils increase maximum Ki. Jewels of the Demon Seal increase Ninpo capacity. These are often found in hidden chests or as rewards for completing challenges. Collecting all of them is vital for maximizing Ryu's power and survivability throughout the game. Pay close attention to your surroundings to find these crucial upgrades.
