Giant Poisonous Snake

Medium Beast, Unaligned

AC: 14

Initiative: +4 (14)

HP: 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

CR: 1/4 (XP 50; PB +2)

Habitat: Underdark, Grassland, Forest, Swamp, Urban, Desert

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.

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Giant Poisonous Snake

Source: Monster Manual (2014), p. 327 - Licenses and attribution