The venom kills on touch and the only creature capable of not dying from it is the basilisk. To retrieve it, a character would have to murder the entire basilisk first and skin it to create a vessel capable of holding its venom as the venom eats through other materials over time, including metals, glass, and other common containment vessels. Materials destroyed by the venom tend to only be recoverable through deals with Morganna. The destructive nature means it cannot be combined with other ingredients for potions except to create useless waste material.