Assumes killing all the Holtzes then farming to full. Morph on the ground near the Zebbo spawner then quickly unmorph and shoot as it starts to move horizontally. While on the runway near the door, freeze the Zebbo again while maintaining a half-tile gap between it and the runway to extend it as much as possible. Gaining Energy from the farm requires some sort of heat reduction.

Requires:

"h_heatResistant"
"h_canFrozenEnemyRunway"
"Morph"
{
  "heatFrames": 500
}

Exit condition:

{
  "leaveWithRunway": {
    "length": 6,
    "openEnd": 0
  }
}

Unlocks doors:

{"types":["ammo"],"requires":[]}