Spark horizontally and fall to the bottom left door. Note that it is possible to spark with less Energy while avoiding the Skultera if starting with a precise amount of Energy: When sparking from the left side of the platform, spark with between 88 and 103 Energy while suitless.

Entrance condition:

{
  "comeInShinecharged": {},
  "comesThroughToilet": "any"
}

Requires:

{
  "or": [
    "Gravity",
    "HiJump",
    "canSpringBallJumpMidAir",
    "canPrepareForNextRoom"
  ]
}
"canHorizontalShinespark"
{
  "or": [
    {
      "and": [
        "Gravity",
        {
          "shineChargeFrames": 15
        },
        {
          "shinespark": {
            "frames": 73
          }
        }
      ]
    },
    {
      "and": [
        "canSuitlessMaridia",
        {
          "shineChargeFrames": 25
        },
        {
          "shinespark": {
            "frames": 92,
            "excessFrames": 12
          }
        }
      ]
    },
    {
      "and": [
        "canSuitlessMaridia",
        "canControlShinesparkEnd",
        {
          "shineChargeFrames": 25
        },
        {
          "shinespark": {
            "frames": 92,
            "excessFrames": 33
          }
        }
      ]
    }
  ]
}

Dev note: The variant with canControlShinesparkEnd could end at 5, but it would require other items to go to 4, which would no longer make this useful.