Hedgehog
From A Wheel of Time Wiki
A ter'angreal, in the shape of a wooden carving of a hedgehog, no bigger than the last knuckle of a man's thumb. Any woman who tried to channel through it went into half a day of peaceful dreamless sleep,[1] and it could be used to trap others as well.
It was part of a cache of ter'angreal stolen by the Black Ajah who fled the White Tower, and used as a trap for Moiraine Sedai in Tear.[2] It was broken by Perrin Aybara to rescue Faile, who had instead triggered the trap, from its effect.[3]
