Poison Spray now has a range of 30 feet rather than 10 feet, and it uses an attack roll rather than a saving throw. Also, it is now a Necromancy rather than a Conjuration spell. (This is now two spells, the old one being "Conjure Poison Spray", and the new one being "Necromantic Poison Spray")
— Changes due to 5.5
I really do try to make most of this original, but since Forgotten Realms is an integral part of the world I can't help if anything is used without formal permission, but is still "fair use" as I am just using this for my private games.