Mizzium Armor

Armor While you're wearing the armor, any critical hit against you becomes a normal hit.
In addition, when you are subjected to a magical effect that allows you to make a Strength or Constitution saving throw to take only half damage, you instead take no damage if you succeed on the saving throw. Rare

This suit of armor is reinforced with a magically en-hanced metal alloy called mizzium, which is made in Izzet foundries.