Basilisk

Medium Monstrosity, Unaligned

AC 15     Initiative −1 (9)
HP 52 (8d8 + 16)
Speed 20 ft.

Ability Scores
STR 16 (+3) Save +3    DEX 8 (−1) Save −1    CON 15 (+2) Save +2
INT 2 (−4) Save −4    WIS 8 (−1) Save −1    CHA 7 (−2) Save −2

Senses Darkvision 60 ft.; Passive Perception 9
Languages None
CR 3 (XP 700; PB +2)

Actions
Bite. Melee Attack Roll: +5, reach 5 ft. Hit: 10 (2d6 + 3) Piercing damage plus 7 (2d6) Poison damage.

Bonus Actions
Petrifying Gaze (Recharge 4–6). Constitution Saving Throw: DC 12, each creature in a 30-foot Cone. If the basilisk sees its reflection in the Cone, the basilisk must make this save.
First Failure: The target has the Restrained condition and repeats the save at the end of its next turn if it is still Restrained, ending the effect on itself on a success. Second Failure: The target has the Petrified condition instead of the Restrained condition.