Monstrous Monday: Hyrrokkin Hag

Here is one I have been playing around with for a while now.  I am converting her from my d20 3.5 stats, so I hope it works out. 

Here is a monster that combines two great tastes that go great together, Norse Mythology and Werewolves.  Plus after watching some werewolf movies last night (and one tonight) it would be fun. 

Hag, Hyrrokkin
Large Fey (Hag)
Frequency: Very Rare
Number Appearing: 1 (1)

Alignment: Chaotic [Chaotic Evil]
Movement: 120' (40') [12"]

  Wolf form: 180' (60') [18"]
Armor Class: 3 [16]
Hit Dice: 8d8+24** (64 hp)
Attacks: 2 claws or bite or spells
Damage: 1d8+4 x2 or 1d8+2 or by spell
Special: Witch spells (7th level), werewolf shape, damaged by silver
Size: Large
Save: Witch 8
Morale: 10

Treasure Hoard Class: VII (but no silver)
XP: 1,750

The Hyrrokkin Hags are believed to be the offspring of the great Jotun witch Hyrrokkin.  They can be identified by their pale skin, yellow eyes, and yellow hair.  They stand close to 9 ft. tall and are extremely strong (Strength 20).  They are known to keep wargs and dire wolves as servants and pets. Like their legendary mother, they will ride a warg the size of a war-horse.

Hyrrokkin Hags are fiercely territorial and will not suffer anyone to be in their self-proclaimed territories, especially other hags. While theoretically, they could form coveys with other hags, their hatred of them precludes this.  

They can transform into a large wolf or wolf hybrid as per a werewolf.  In this form, they can even transmit lycanthropy which gives them the sobriquet of "Mother of Werewolves."  Anyone with lycanthropy that sees a Hyrrokkin Hag must make a save vs. spells or be charmed as per the spell.

They can cast spells as per witch of the 7th level, but they have no occult powers.  If their spells are insufficient they can also attack with powerful claws or a bite.  This can be done in any form. They may only cast spells in Hag form.

These hags are damaged by silver, not by cold iron as their cousins.  Also, no treasure horde of a Hyrrokkin Hag will have silver.  One clue that a Hyrrokkin Hag has attacked a group is if all their treasure is gone save for their silver.