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A spider with only seven legs, born on a leap year. This spider's mother was cursed by a russian witch by the name of hilda. A tnecniv can't eat insects and can only eat its own web. This spider can only die if it is eaten by a spider of its same species in Topeka, Kansas. When it is eaten, the cannibal spider will inplode, never to be seen again. Seeing a tnecniv will cause extremely bad luck, unless you give it a spider leg, then it will give you extremely good luck.
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