The key hole that goes around riku in ASAS is NOT the key hole to unlock that world! It's the key hole that unlock's the door in the secret tunnel at Destiny Island's!!! The keyhole in Destiny Island's need's two keyblade's and two heart's to unlock it, meaning Riku and the blonde haired kid. The key hole that went around Riku was half of the heart to unlock destiny island's secret door. It's pretty cool huh?