Graystaff Magic. The hag carries a graystaff, a length of gray wood that is a focus for her inner power. She can ride the staff as if it were a broom of flying. While holding the staff, she can cast additional spells with her Innate Spellcasting trait (these spells are marked with an asterisk). If the staff is lost or destroyed, the hag must craft another, which takes a year and a day. Only a bheur hag can use a graystaff.

Ice Walk. The hag can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn't cost her extra moment.

 Innate Spellcasting. The hag's innate spellcasting ability is Wisdom (spell save DC 16, +7 to hit with spell attacks). She can innately cast the following spells, requiring no material components:

Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 10 (2d8 + 1) bludgeoning damage plus 3 (1d6) cold damage.

Ray of Frost. Ranged Spell Attack: +7 to hit, reach 10/90 ft., one target. Hit: 14 (2d10+4) cold damage. On a hit, the creatures movement speed is reduced by half until the end of its next turn. 

Snowstorm (Recharge 4-6). The hag creates a blizzard in a 40-foot-high, 20-foot radius cylinder centered on a point she can see within 120 feet of her. The effect lasts until initiative count 20 on the next round. The blizzard lightly obscures every creature and object in the area for the duration. A creature that enters the blizzard for the first time on a turn or starts its turn there is blinded until initiative count 20 on the next round.

Maddening Feast. The hag feasts on the corpse of one enemy within 5 feet of her that died within the past minute. Each creature of the hag's choice that is within 60 feet of her and able to see her must succeed on a DC 15 Wisdom saving throw or be frightened of her for 1 minute. While frightened in this way, a creature is incapacitated, can't understand what others say, can't read, and speaks only in gibberish; the DM controls the creature's movement, which is erratic. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the hag's Maddening Feast for the next 24 hours.