Bring a Shinecharge from the top door to the speed blocks below the Missile item location. Be especially mindfull of the aquatic life during the descent. Line up directly below the speed blocks when jumping up.

Entrance condition:

{
  "comeInShinecharging": {
    "length": 14,
    "steepDownTiles": 2,
    "openEnd": 0
  }
}

Requires:

"Gravity"
"canChainTemporaryBlue"
"canXRayTurnaround"