Mat’s amulet blocks both saidin and saidar . Jordan answered this one straight-out when asked. He pointed out that the amulet only blocks actual weavings of the One Power, not the physical effects that could be caused by a weaving. For example, Elayne was able to use the One Power to hurl a rock at Mat. Rahvin was able to create a bolt of lightning which struck Mat. (Jordan noted that Mat’s death by lightning and subsequent undoing of his death when Rand balefired Rahvin, fulfills a prophecy about living, dying, and then living again.)
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