Requires:

{
  "or": [
    "canPreciseWalljump",
    "canSpringBallJumpMidAir",
    "SpaceJump"
  ]
}
{
  "heatFrames": 400
}
{
  "or": [
    "h_canUsePowerBombs",
    {
      "obstaclesCleared": [
        "A"
      ]
    }
  ]
}

Clears obstacles: A

Unlocks doors:

{"types":["missiles"],"requires":[{"heatFrames":30}]}
{"types":["powerbomb"],"requires":[],"useImplicitRequires":false}

Dev note: Destroying the obstacle isn't seen to take extra time for two reasons. 1- It destroys the shot blocks as well which are assumed to be manually destroyed each time since they respawn. 2- Some of the time loss of waiting for the PB is offset by having to setup for the jump up anyway.