Arch-Mage's apparatus

While wearing this, your AC is 10 + your spellcasting bonus. You gain advantage on your concentratrion checks and gain an additional
spell slot of your highest spellcasting level.
You can no longer cast divine magic. Spells you cast cost three times their spell level in health in addition to their spell slots. You may choose which friendly targets loses the life.
Magic is like wine. And the Divine don't drink.