Giant Lizard (Hold Breath and Spider Climb)

Source: Monster Manual p. 326. Available in the SRD and the Basic Rules (2014)

"name": "Giant Lizard (Hold Breath and Spider Climb)"
"size": "Large"
"type": "beast"
"alignment": "Unaligned"
"ac": !!int "12"
"ac_class": "natural armor"
"hp": !!int "19"
"hit_dice": "3d10 + 3"
"modifier": !!int "1"
"stats":
  - !!int "15"
  - !!int "12"
  - !!int "13"
  - !!int "2"
  - !!int "10"
  - !!int "5"
"speed": "30 ft., climb 30 ft., swim 30 ft."
"senses": "darkvision 30 ft., passive Perception 10"
"languages": ""
"cr": "1/4"
"traits":
  - "desc": "The lizard can hold its breath for 15 minutes."
    "name": "Hold Breath"
  - "desc": "The lizard can climb difficult surfaces, including upside down on ceilings,\
      \ without needing to make an ability check."
    "name": "Spider Climb"
"actions":
  - "desc": "*Melee Weapon Attack:* +4 to hit, reach 5 ft., one target. *Hit:* 6 (1d8\
      \ + 2) piercing damage."
    "name": "Bite"
"source":
  - "MM"

Environment

underdark, forest, swamp, desert, coastal