The Annis

In addition to the green hag, night hag and sea hag, there was also the annis. She didn't make the cut for 5e for whatever reason. The annis is the physically largest and most direct of the hags. They also like to hang with ogres and trolls, perhaps a bit more than other hags.

Annis

Medium fey, neutral evil

Armor Class 17 (natural armor)

Hit Points 90 (12d8+36)

Speed 35 ft.

Str        Dex      Con      Int        Wis      Cha

19 (+4) 11 (+0) 16 (+3) 11 (+0) 12 (+1) 12 (+1)

Skills Deception +3, Perception +3, Stealth +2

Senses darkvision 60 ft., passive Perception 13

Languages Common, Giant

Challenge 3 (700 XP)

Innate Spellcasting. The hag’s innate spellcasting ability is Charisma (spell save DC 11). She can innately cast the following spells, requiring no material components:

3/day: fog cloud

Actions

Multiattack. The hag makes two attacks: one with her bite and one with her claws.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6+4) piercing damage.

Claws. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 13 (2d8+4) slashing damage, and the target is grappled (escape DC 14).

Illusory Appearance. The hag covers herself and anything she is wearing or carrying with a magical illusion that makes her look like another creature of her general size and humanoid shape. The illusion ends if the hag takes a bonus action to end it or if she dies.

The changes wrought by this effect fail to hold up to physical inspection. For example, the hag could appear to have smooth skin, but someone touching her would feel her iron-hard flesh. Otherwise, a creature must take an action to visually inspect the illusion and succeed on a DC 18 Intelligence (Investigation) check to discern the hag is disguised.

The annis the largest and most physically imposing of the hags, standing 7 to 8 feet in height, and possessing deep blue skin that feels like iron. Hair, teeth, and nails are glossy black in color. The annis is typically much more direct than other types of hags, delighting in rending the flesh of her victims with her claws.

Joy in Cruelty

The greatest joy an annis can have is to inflict as much cruelty on another creature as possible. To hear the wail of anguish of a loved one while she slaughters a victim is delightful music to her ears.

Covens

An annis that is part of a coven has a challenge rating of 5 (1,800 XP).