Source: More Magic of Thassilon, pg(s). 3
The sadist's lash is a magical whip first constructed during the days of ancient Thassilon, most probably by the mages of the Realm of Lust, Eurythnia. Made of black leather with wires of silver alloy running through it, the enchanted lash causes its victims to bleed profusely. Its wielder can cast any spell through it that would otherwise require one to physically touch the target, and also makes its victims highly susceptible to enchantment spells; this vulnerability subsides after about a minute.