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Mae’n ddrwg gennym ‘dyw’r bennod yma ddim ar gael ar hyn o bryd

Ar ôl yr holl hyfforddi mae wythnos ei sialens anoddaf wedi cyrraedd, ond mae storm anferth ar fin taro Eryri! After all his training, it's time for Huw to attempt his hardest challenge yet!

48 o funudau

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