Rattlesnake
5
Ectotherm.

During the day, your speeds are increased by 2 and you start encounters with 2 temporary HP per level.

During the night and during a round you take cold damage, your speeds are decreased by 2 and you miss on a 1 or 2.

Ambush Predator.

You always act first.

Choose one.
  • Venomous Bite (Once).1d3

    On damage: target must make a DC 11 strength save or suffer 13-(2 per size above tiny) d6 poison damage (a medium creature suffers 9d6)

  • Bite.1d3
  • Run away!

    Move 12 while not provoking opportunity attacks.

As long these venomous creatures are not summoned beasts of some evil magician, they are not evil or malicious - they're just trying to live their life! Against a small or larger foe, they will only ever strike once and then flee (unless their path to escape is blocked), and there is only a 25% chance they use their venomous Bite (venom takes a lot of calories to make!). But if they are attacking a tiny hero, they will always strike with their venom - they hope to eat them!