Stand to the right of the center spike Run to the left, and continue running left while getting knocked back right by the spike. The spike i-frames allow shortcharging while running through the left two spike blocks. After gaining a shinecharge, turn back right, run, and jump through the door.

Requires:

{
  "obstaclesCleared": [
    "A"
  ]
}
{
  "obstaclesNotCleared": [
    "B"
  ]
}
{
  "canShineCharge": {
    "usedTiles": 23,
    "openEnd": 0
  }
}
{
  "spikeHits": 1
}
"canIframeSpikeJump"
"canShinechargeMovementComplex"

Exit condition:

{
  "leaveShinecharged": {
    "framesRemaining": 62
  }
}