<section begin="qiskullcavern" />After reading [[ひみつのメモ#ひみつのメモ #10|ひみつのメモ #10]], the player will find [[ミスターQi]] at level 100 of the [[ドクロの洞窟]]. A cutscene ensues in which:
{{collapse|content=ミスターQi will either congratulate the player for reaching level 100 without using [[階段]] or say the player is "clever" but not "honorable" for using them. In either case, he will award the player with Iridium Snake Milk, which permanently increases the player's [[体力]] by 25 points.}}