NRS 111.185: Power of revocation at will.

Every conveyance or charge of or upon any estate or interest in lands, containing any provision for the revocation, determination or alteration of such estate or interest, or any part thereof, at the will of the grantor, shall be void, as against subsequent purchasers from the grantor for a valuable consideration, of any estate or interest, so liable to be revoked or determined, although the same be not directly revoked, determined or altered by the grantor, by virtue of the power reserved, or expressed in such prior conveyance or charge.