Tatzelwurm 2014
CR 6 dragon
Medium dragon, neutral evil
Its blood is as toxic as its bite. When it takes piercing or slashing each creature within 5 ft. of it: DC 14 Con save or take 5 (2d4) poison. A creature that consumes flesh of tatzelwurm: DC 14 Con save or poisoned 8 hrs.
If it moves 20'+ straight to creature and then hits it with Claw on same turn target knocked prone (DC 14 Str negates). If target prone wurm can make one Bite vs. it as a bonus action.
Legendary Actions
Up to half its speed with o provoking opportunity attacks.
Each creature within 30' of it: frightened until the end of its next turn (DC 13 Wis negates).
Swings its tail in a wide arc around it. Each creature within 10 ft. knocked prone (DC 14 Str negates).
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details