Cross the room with Bombs and minimal damage. Acid damage is expected, but any mistakes greatly increases the time spent in acid.

Entrance condition:

{
  "comeInRunning": {
    "minTiles": 3,
    "speedBooster": "any"
  }
}

Requires:

{
  "notable": "Bombs"
}
"h_canUseMorphBombs"
"Gravity"
"canResetFallSpeed"
"canJumpIntoIBJ"
"canSuitlessLavaDive"
{
  "enemyDamage": {
    "enemy": "Puromi",
    "type": "contact",
    "hits": 2
  }
}
{
  "heatFrames": 1440
}
{
  "acidFrames": 725
}

Unlocks doors:

{"types":["missiles"],"requires":[{"heatFrames":15},{"acidFrames":15}]}
{"types":["super"],"requires":[]}
{"types":["powerbomb"],"requires":[{"heatFrames":50},{"acidFrames":50}]}