Spoiler: Eilyra
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With the purple robe on, although you feel a chill, it's lessened. However, beyond the doorway, you see nothing; it's totally dark, even to darkvision.


Spoiler: Ash
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When you put the black robe back on, you once again see the 'spirit'. He shakes his head at you.

However, the darkness beyond the doorway appears unchanged.


Ash casts a spell of light on a stone and tosses it through the doorway. Once it passes through the doorway, it's no longer visible; the light is instantly swallowed by the darkness. However, you hear the stone clatter onto stony ground.

Taric puts on a purple robe as best he can, and steps through the doorway.

Spoiler: Taric
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The purple robe does the trick, and while you still feel a deep chill, the cold doesn't harm you. However, you see nothing, even with your darkvision.