Skipping the Spider Ball: Transport to Magmoor Caverns South

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This room has a spider ball track at the back of it. If you reach the ice door without the Spider Ball, you can access the far side of Phendrana before fighting Thardus and without ever visiting the research lab.
Start by jumping on any piece of debris that allows you to stand on it for extra height. Space jump from there to either of the two poles closest to the ice door, then use an optional L Jump to reach a ledge just above the Spider Ball Track.