Giant Viper

Creature 2

Medium
animal

Perception: +7; low light vision, scent (imprecise) 30 feet
Skills: Acrobatics +9, Athletics +8, Stealth +8, Survival +6; Str +3, Dex +4, Con +3, Int −4, Wis +1, Cha −2

AC: 17; Fort +8, Ref +11, Will +6
HP: 26

Coiled Strike (Special) ⟲ As Reactive Strike, but the snake can use this reaction only if it's Coiled.

Speed: 20 feet, climb 20 feet, swim 20 feet

Melee ◆ fangs +11 (finesse), Damage 1d8+3 piercing plus Giant Viper Venom

Coil ◆ The giant viper uses an action to coil itself. While Coiled, the reach of its fangs is 10 feet and it has the Reactive Strike reaction. After the giant viper Strikes with its fangs, it becomes uncoiled.

Giant Viper Venom (poison) Saving Throw DC 17 Fortitude

Maximum Duration 6 rounds

Stage 1 1d6 poison damage (1 round)

Stage 2 1d6 poison damage and Drained 1

Source: Pathfinder Monster Core

Running this fight? Add the giant viper to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.