|Super áspidem et basilíscum ambulábis.||You will walk upon the asp and the basilisk.|
ambulabis = you will walk, future tense.
Super = over / upon.
aspidem = asp. An asp.
basiliscum = basilisk. From Wikipedia:
In European bestiaries and legends, a basilisk (from the Greek βασιλίσκος basilískos, “little king;” Latin regulus) is a legendary reptile reputed to be king of serpents and said to have the power to cause death with a single glance. According to the Naturalis Historia of Pliny the Elder, the basilisk of Cyrene is a small snake, “being not more than twelve fingers in length,” that is so venomous, it leaves a wide trail of deadly venom in its wake, and its gaze is likewise lethal.