Shoot the Skree closest to the door, and horizontal damage boost using one of the particles that it spawns.

Requires:

{
  "enemyDamage": {
    "enemy": "Skree",
    "type": "particle",
    "hits": 1
  }
}

Exit condition:

{
  "leaveWithDamageBoost": {
    "iFramesRemaining": 80
  }
}