Pride is one of the Mirror traits in the Vaas: Insanity DLC. Its free first level gives Vaas Healing Syringes that refill over time, and the later levels raise maximum health in five steps.
Level 1 hands you Healing Syringes that come back over time, so you always have some healing. Each later level adds to Vaas's maximum health, which lets you survive more hits before a run ends.
Walk up to the Mirror in a safe house and spend Cash, the currency you earn in Vaas: Insanity. Levels unlock in order, and each one costs more than the one before.
Yes. Extra health is one of the best ways to make runs last longer, especially before you have strong weapons.
Envy (Vaas)
Adds up to four gadget sockets to the weapon wheel.
Greed (Vaas)
Lets you keep more currency after dying, and at the top level recover your full inventory where you died.
Sloth (Vaas)
Adds syringe capacity, the Camera, the Wingsuit, Parachute and Grapple, faster crouch movement and vehicles at safe areas.
Vaas' Wrath
Improves takedowns: speed boosts, reloads, small heals, front takedowns on alerted enemies and takedowns on Heavies.