n medium beast 

Perception +11; darkvision

Skills Athletics +13, Stealth +8

Str +4 Dex -1 Con +5 Int -3 Wis +2 Cha +1

AC  22; Fort +14, Ref +8, Will +11

HP 75

Petrifying Glance [R] (arcane, transmutation) When a creature the basilisk can see within 30 feet starts its turn, the basilisk can use its reaction to glance at the creature. The creature must attempt a DC 20 Fortitude save. If it fails, it gains the slowed 1 condition for 1 minute as its body slowly stiffens.

Speed 20 feet

Melee [>] jaws +15, Damage 2d8 + 4 piercing

Petrifying Gaze [>>] (arcane, concentrate, transmutation) The basilisk stares at a creature it can see within 30 feet. If the creature can see the basilisk, that creature must attempt a DC 22 Fortitude save. If it fails and hasn't already gained the slowed condition from Petrifying Glance or this ability, it gains the slowed 1 condition. If the creature fails this save when it already has the slowed condition from this ability or Petrifying Glance, the creature is permanently turned to stone. A creature petrified in this manner that is coated with fresh basilisk blood is instantly restored to flesh. A single basilisk contains enough blood to coat up to 2 creatures in this manner.

Beginner Box, page 57. Reprinted in TiO.