Vipera Evanesca is the incantation for the spell that, when cast, causes a target Snake to vanish in a puff of black smoke. As such, it can be used as a counter-spell for spells that produce serpents, such as Serpensortia or the Fire to snake spell, annihilating the conjured or transfigured snake. Alternatively, the spell may also send a ball of fire at the serpent, which proceeds to incinerate it, leaving behind a wisp of smoke.