|Notes||the basilisk was a serpent of small size, which possessed a white spot resembling a diadem upon its forehead
The basilisk’s extremely potent venom instantly kills anyone bitten, the victim turning black and necrotic. Its breath is less powerful how- ever, having only half the Potency. Anybody coming close enough to strike the serpent with a melee weapon must enter the invisible corona of its miasmic exhalation – which has a range equal to its STR in metres. Those who successfully resist the venom take no other effect but must make a new save at the start of each round they stay within the cloud.
Source: Mythic Rome 155|