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": {
  "speedBooster": "any",
  "minTiles": 1
}

Requires:

{"notable": "Bombs"},
"h_useMorphBombs",
"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}
  ]
}