Basilisk

Basilisk are a massive serpent, typically around ten to twenty feet long, they are able to put humans into a comatose state simply by looking at them, however, this effect must be done with direct eye contact, meaning if a basilisk looks at you through glass, you will not become comatose. Basilisks are immune to most physical attacks, unless it is caused by cold (aka pure) iron. The easiest way to kill a basilisk is by removing it’s head or eyes.

They normal sewer and natural formal caves. Do to this they are one of the the least danger monster, as they don't really come across human on a day to day. Hunters do not active hunt Basilisk but will normal kill one if they run across them.