Use the Solid Blocks next to the Samus Eater to clip up through the Power Bomb Blocks. The thorns do not cover the entire blocks above. Jump barely only onto the corner to avoid the damage. Carefully jump around the thorns, tunnel crawl slightly to avoid touching the thorns when partial floor clipping. Morph and x-ray can be used instead to setup the clip much easier.

Requires:

"canTrickyJump"
{
  "or": [
    "canXRayCeilingClip",
    "canTunnelCrawl"
  ]
}
"canPartialFloorClip"
"canCeilingClip"