Giant Poisonous Snake

Medium, beast, unaligned

CR 1/4AC 14HP 11 (2d8)

Speed swim 30 ft, walk 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

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.