OK so this is sorta off topic but, the Vishkanya are described as having poisonous blood. "So pick your poison" seems like it might be a first level save v. death spell against them. Also of note the race is poison resistant and not immune to poison so it stands to reason you could use this spell as a touch kill attack. {frankly i find this interesting since my bbeg in my upcoming campaign is vishkanya i cant wait to drop a scroll of this spell and see if they figure it out.}