Game of Thrones' Samwell Tarly could be key to defeating the White Walkers 

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With Westeros finally in the grips of winter and White Walkers terrifyingly marauding all over the place, something needs to be done

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And according to Sam actor John Bradley, he might be the man for the job.

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"I think he absolutely could be [the key to defeating the White Walkers]," he told a San Diego Comic-Con livestream.

During the sixth season, Sam managed to pinch Heartsbane, his family sword. The weapon is made from Valyrian steel - which is one of the few things that can actually kill White Walkers.

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In the finale, \'The Winds of Winter\', Sam and Gilly also arrived at the Oldtown Citadel, where Sam was given access to its enormous library.

Armed with Valyrian steel and a library of knowledge at his fingertips, Sam Tarly saving the day seems a reasonable enough theory. We\'re almost certain Gilly won\'t be any help though.

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