Spectre armor

Spectre armor is extremely effective late game mage style armor, providing higher defense than it's hallow counterpart. It also has the unique properties of healing upon causing magic damage. Every time the player wearing the armor causes magic damage to an enemy a small white sphere is created that travels to a nearby team member who has the lowest health and heals them for about 10% of the damage dealt. the orb will also heal the wearer, if no team member has lower health. Each sphere heals only a small amount of health, but any cast that hits multiple enemies will provide health upon every hit and certain attacks can quickly add up.

Set
Set Bonus: Approximately 10% of Magic Damage done to enemies heals the player with lowest health.

Tips
Items like the Shadowbeam Staff and the Magic Dagger are a good combination with the Spectre Armor, as the healing effect will continue, providing you have enough mana.

Multi-hit spells like Inferno Fork, Demon Scythe and Magnet Sphere work extremely well against hardmode bosses like The Destroyer and the PC's hardmode bosses like Golem and Plantera. Keeping your teammates as well as your self healthy throughout the fight.