Unbreakable Ward

When you cast this spell, you carve a small symbol into an object no larger than a 40 foot cube, then sprinkle the powdered diamond onto the symbol. This spell prevents anyone except the caster and anyone the caster specifies from touching or moving the object, and if anyone but the caster and specified creatures touch it, they take 3d6 fire damage as the symbol is burned into their palm. This damage bypasses resistance and immunity to fire damage. Nothing short of Wish or Divine Intervention can remove this spell, and it still remains active even if any spells were cast to nullify magic, like Dispel Magic or Antimagic Field.