Spellslayer wine was an alchemical concoction that temporarily disabled arcane casters' ability to use magic. It was discovered by an herbalist in Daerlun named Janesse Wyndsur. The potion was discovered accidentally by Janesse while she was experimenting with painkilling potions. The potion was made from wyverns' blood, oak sap, harpy blood, and the herbs alarvaun, drace and thelmallow flowers. Janesse began selling the potion in 1476 DR.