Enter the room in direct G-mode, and land on the doorsill while artificially morphed. Use a bomb to boost over the the left runway, or land on a snail and bomb off of it while the water is low. If entering in immobile, it is important to avoid being pulled through the floor and into the water by the snail. The Snails will dig through the sand without showing any visual difference. Each block they pass through gets closer to overloading PLMs. In order to Power Bomb the left wall before PLMs are overloaded, it is necessary to only allow one snail to dig, either by bombing one or by facing one to prevent movement until it is off screen. It is important to place the Power Bomb while as far right as possible to ensure that PLMs have not been overloaded before breaking the wall, or, wait until the snail has fully overloaded PLMs and dug a small place where Samus can unmorph against the wall to place the Power Bomb before quickly unmorphing and exiting G-mode. The green stone changes one tile earlier than the wall, and can be used as a visual cue to place the Power Bomb. Note that the Snails will not dig while off screen or while Samus is facing them, even while she is morphed.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "direct",
    "morphed": true
  }
}

Requires:

{
  "notable": "Reverse G-Mode Morph"
}
"h_artificialMorphIBJ"
"h_artificialMorphPowerBomb"

Clears obstacles: A, B, f_ShaktoolDoneDigging