The skin of a Basilisk emanates a poison that forms a corrosive miasma surrounding them, suffusing both their bodies and spirit, that is so poisonous that the ground they walk on becomes poisonous itself. This can quickly reduces even verdant land into ruinous wasteland, wrecking both crops and livestock. The poison causes those affected by to choke on their own blood as they fall victim to its corrosive effects.
Their malignant gaze, it's most infamous and deadly ability, allows it to focus its malice upon their victims. This radiates an evil that slowly melts their victim, turning them into a pile of steaming flesh sloughed from their bones and blistering metal that was once their equipment, and causes even plant life to wither.
Basilisks are reclusive menaces, creatures that are hate-filled and destructive.