Basilisk

Basilisks are reptile-like creatures known for their ability to turn other creatures to stone.

On Exandria, there are several varieties of basilisk. Some basilisks are kept by duergar in the Underdark. Ice-scaled basilisks can be found in the Frostweald. Those land-based, lizard-like basilisks are physically distinct from their much larger, serpentine, aquatic cousins, the Swavain basilisks.

Description
Land-based basilisks are medium-size, eight-legged, lizard-like creatures that are considered very dangerous due to their natural abilities. The duergar in Emberhold raised these creatures as guardians and weapons. They have purple blood.

Swavain basilisks are huge, sea-snake-like creatures. They are drawn to shipwrecks, where they can hunt treasure-seekers, but they also are known to hunt ashore and along inland waterways.

Abilities
Land-based basilisks are known for their petrifying eyes that can turn others into stone a statue should both creatures make eye contact. The petrification effect could be removed with Greater Restoration, a specific antidote distilled from basilisk blood, or apply willowshade oil. In addition, they have a poisonous bite.

Swavain basilisks also have a poisonous bite, but they petrify their prey with their thick, oily secretions.

Pre-Stream
Vox Machina had a basilisk encounter in the Frostweald in which Vex was briefly petrified.

Vox Machina fought two pet basilisks in the throne room of Emberhold fortress. Tiberius and Lady Kima were petrified but later restored by Pike.

In Thunsheer 836 PD, Pumat Sol offered the Mighty Nein 5,700 gold if they could procure a vial of Swavain basilisk oil in the next couple of months. They did not do so, and Veth apologized upon their return from the Swavain Islands.