A Relic is an item that passively boosts one or more aspects of a character. Though the abilities of relics are extremely varied, they are generally powerful bonuses to one or more related statistics, many of which can be increased by no other means.
A relic is different from an Artifact in that its use does not augment the user's Action Skill, is not restricted by class and may or may not be tied to a specific element. Relics appear only in Borderlands 2. All relics are made by Eridians.
Common Relics
Vitality Relic - Boosts the character's maximum health by a percentage up to 50%.
Allegiance Relic - Boosts a specific manufacturer's effects (reducing recoil, increasing damage, accuracy, reload speed, etc.). Can have a maximum of two effects simultaneously; both are applied to the same manufacturer.
Stockpile Relic - Boosts the munitions a character can carry of a specific class of weapons. Can also increase the maximum number of grenades a character can carry. Maximum of three can be increased simultaneously.
Aggression Relic - Increases weapon damage or fire rate with a specific weapon type (pistols, sniper rifles, etc.).
Resistance Relic - Boosts resistances to one or several elemental or non-elemental damage types. Maximum of four resistances may be present.
Tenacity Relic - Improves the bleed out time in Fight for Your Life before death, and/or improves the health characters revive with after a Second Wind.
Elemental Relic - Increases damage dealt with a specific elemental damage type.
The Afterburner - Enhances vehicle capabilities including Boost Capacity, Boost Recharge Rate, Boost Recharge Delay.
Blood of Terramorphous - Regenerates 0.5% of your health every second. (The health regeneration will always be 0.5%, regardless of the relic's required level.
Captain Blade's Otto Idol - Restores a portion of the user's health on kill, Decreases Fight For Your Life duration.
Sheriff's Badge - Increases pistol fire rate, pistol damage, Increased Fight For Your Life duration and max health by 15% for every Deputy's Badge in the party.
Deputy's Badge - Increases shotgun damage and reload speed. +10% duration to Fight For Your Life for every equipped Deputy's Badge in the party.
Vault Hunter's Relic - Increases the chance of finding rare loot by 5%. (Chance of enemies dropping green rarity loot instead of white)
Lucrative Opportunity - Speeds up the Shop Timer Rate, the time taken for the vendors and their machines to restock.
Blood of the Seraphs - Increases health statistics and adds health regeneration. No longer changes stats each time the relic is equipped.
Bone of the Ancients - Increases Damage of one elemental type and improves Action Skill Cooldown Rate.
Heart of the Ancients - Increases Damage from one specific weapon type, improves Fight for Your Life time and the HP gain from Second Wind.
Skin of the Ancients - Increases resistances of up to three elemental types, including non-elemental. Also improves shield Recharge Rate and/or Capacity.