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Freeze a Zebbo inside the wall above the right side of the spikeway, close to the ceiling thorns. Face right, equip X-Ray, move at least a few pixels away from the wall, and jump straight up into the ceiling thorns. If successful, Samus will be knocked back into the wall and end up standing inside it. Use X-Ray immediately to prevent additional thorn hits. If Samus is high enough to be touching the thorns, then i-frames will continue to be refreshed once per second. While X-Ray climbing, be careful to only release X-Ray soon after i-frames are refreshed. Crouch before pressing X-Ray again.

Requires:

{
  "notable": "Wall Ice Clip X-Ray Climb"
}
"canWallIceClip"
{
  "thornHits": 1
}
"canXRayClimb"
"canUseIFrames"
"canNeutralDamageBoost"

Dev note: Standing at least 3 pixels away from the wall ensures that knockback pushes Samus fully up against the ceiling; there is also no problem with standing further right, even hanging off the ledge: as long as Samus is still in range to take damage from the thorns above, they will be able to knock Samus into the wall. It is possible to freeze the Zeebo lower, but if Samus is too low, it will be necessary to take 3 thorn hits. It is also possible to get stuck inside the wall by taking knockback from a floor thorn, or by using a frozen Beetom as a platform. However those methods are not any easier, more damage will be taken, and the climb will be longer. If Samus begins climbing at a level below the ceiling thorns, then as Samus approaches the thorns, X-Ray will need to only be released while turning to the right, in order to prevent the thorn hits from knocking Samus out of the wall.