Wondrous Item, artifact (requires attunement by a dragonborn who can cast spells)
This mask is the burial mask of an ancient king who worshipped Tiamat. This mask has 6 charges, and regains 1d6 daily at dawn. While wearing this mask, you can expend a charge to cast a 5th level or lower abjuration, conjuration or illusion spell at 5th level without expending a spell slot. In addition, you gain a +1 to AC.
Notes: Bonus: Armor Class, This is based on Vokun, the dragon priest mask from TES V: Skyrim. The original enchantment reads: -20% Alteration, Conjuration, and Illusion magicka cost., dragonborn who can cast spells, Buff, Headwear
Any suggestions for improvements are more than welcome.