thirdtofifth: ChwidenchaLarge aberration, unalignedArmor Class 15 (natural armor)Hit Points 168 (16d

thirdtofifth:

Chwidencha
Large aberration, unaligned
Armor Class 15 (natural armor)
Hit Points 168 (16d10 + 80)
Speed30 ft., burrow 30 ft.
Str22,Dex17,Con20,Int3,Wis16,Cha3
Damage Vulnerabilitiesthunder
Sensestremorsense 60 ft. passive Perception 13
Languagesunderstands Undercommon but can’t speak
Challenge9 (5000 XP)
Regenerating Legs. The chwidencha has twenty legs. Each leg can be attacked (AC 17; 15 hit points; immunity to poison and psychic damage). Destroying a leg deals no damage to the chwidencha. The chwidencha regrows all of its destroyed legs after it finishes a long rest.
Tunneler. The chwidencha can burrow through solid rock at half its burrowing speed and leaves a 10-foot-wide tunnel in its wake.
Actions
Multiattack. The chwidencha uses Constrict. It then makes four leg rake attacks.
Leg Rake. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 9 (1d6+6) slashing damage and the target is grappled (escape DC 15). While the target is grappled, the chwidencha can’t use the same leg to attack another target.
Constrict.The chwidencha deals 19 (3d8+6) bludgeoning damage to each creature grappled by it.

Chwidenchas are created by the drow goddess Lolth to punish drow who fail some of her many tests. Though created by an evil goddess, chwidencha themselves are not evil; they are animalistic creatures that hunt what they can find in the Underdark, though they have a particular animosity toward drow. Some races keep them as pets, but they are more likely to be found prowling the tunnels of the underworld alongside hook horrors and ropers. 

Originally from the Fiend Folio. A request from tumblrisweird.  If there is a monster from 3.5 or Pathfinder that you want to see converted to 5e, feel free to send me a message or submit a monster request on the submit page.