Last night’s Game of Thrones was quick to remind us of that looming, ever-growing threat: The army of the dead emerged from the winds of winter—and oh shit they have undead giants now.

But it also gave us a small hint at how the humans of Westeros might finally get a fighting chance in the battle.

Aside from Dany’s dragons, the only effective weapons in the war against the dead are Valyrian steel and Dragonglass. For those who need a refresher on …

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