Valador's Ring of Invincibility is an artifact in Heretic. While wearing a Ring of Invincibility, the player is immune to all attacks and has gold-tinted vision. Lasts 30 seconds.

Heretic items
Health	Crystal Vial | Quartz Flask | Mystic Urn
Armor	Silver Shield | Enchanted Shield
Items	Crystal Vial | Map Scroll | Bag of Holding | Ammo
Artifacts	Chaos Device | Morph Ovum | Mystic Urn | Quartz Flask | Ring of Invincibility | Shadowsphere | Timebomb of the Ancients | Tome of Power | Torch | Wings of Wrath