Reaching Level 100 of the Skull Cavern in Stardew Valley is a major milestone that triggers a special event involving Mr. Qi. Upon arriving at this depth for the first time, you will find Mr. Qi waiting for you in a small room. If you reached the level by using fewer than 10 staircases, he will commend your "honor" and prowess; if you used more than 10, he will playfully call you "clever" but note that you took the easy way out. Regardless of your method, he rewards you with Iridium Snake Milk, a permanent power-up that increases your Maximum Health by 25 points. This level does not contain monsters or rocks, acting as a safe haven and a narrative climax for the "Cryptic Note" quest line. In 2026, even with the various updates the game has seen, Level 100 remains the definitive goal for many players, serving as both a test of endurance and the gateway to deeper, more challenging dives into the cavern's infinite floors for rare resources like Iridium Ore and Prismatic Shards.