Astral Silver Armor (5e Equipment)
From D&D Wiki
Armor (Medium or Heavy, except Hide), Very rare
Houses a flawlessly shiny, almost enchanting glow in dim light. The reflection of spirits can be seen passing by the armor.
While wearing this armor, you have +2 to AC
Astral protection You have advantage on saving throws against any single target spell save, and single target spell attacks have disadvantage against you.
Astral brilliance Once per long rest, you can use your reaction to being targeted by a single target spell to instead reflect the spell back at the caster, using the same spellcasting modifiers as the original caster.