Blightwidow

Reach. This creature has advantage against flying creatures.

Ichor. The Blightwidow's teeth and legs are coated with Phyrexian Ichor. Any creature that is successfully attacked must make a constitution saving throw with a DC of 10. A successful save will result in the creature being unaffected by the ichor. A failed saved results in the creature becoming infected. An infected creature will gain 1 level of exhaustion after every long rest the creature undergoes. The creature may make a constitution saving throw at the beginning of every long rest with a DC of 15. A successful save results in the creature no longer being infected. A failed saved means the creature is still infected. Should a creature die from infection due to exhaustion or to any other cause, they will revive in an hour's time as a Contagious Nim.

Multiattack. Blightwidow makes a bite attack and follows up with a swipe from one of its leg scythes.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 6 (1d8 + 2) piercing damage. 

Leg Scythe. MeleeWeapon Attack: +5 to hit, range 10 ft., # target. Hit: 7 (1d10 + 2) slashing damage.

Ensnare. Any creature attempting to move farther than 30 ft. away from Blightwidow will have to make a DC 15 DEX save or be ensnared by webbing that will prevent any movement. A creature that has been successfully ensnared must make a DC 10 STR saving throw to break out of the webbing.