Giant Poisonous Snake

Medium beast, unaligned
Armor Class 14
Hit Points 11 (2d8 + 2)
Speed 30 ft., swim 30 ft.
STR
10 (+0)
DEX
18 (+4)
CON
13 (+1)
INT
2 (-4)
WIS
10 (+0)
CHA
3 (-4)
Skills Perception +2
Senses blindsight 10 ft., passive Perception 12
Languages
Challenge 1/4 (50 XP)
Actions

Bite. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 6 (1d4 + 4) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 10 (3d6) poison damage on a failed save, or half as much damage on a successful one.

Monster Manual (SRD)
  1. DnD 5e Monsters › Giant Poisonous Snake