Fall into the sand and roll all the way to the left, through an invisible tile and under the door platform. Shoot upwards to break part of the platform, then perform a crouch jump and down grab or a tile-wide wall jump climb to escape.

Requires:

"canSuitlessMaridia"
"Morph"
{
  "or": [
    "canSunkenTileWideWallClimb",
    "h_canCrouchJumpDownGrab"
  ]
}