For an impenetrable shield, stand inside yourself.
The Legendary Shield Neogenator is manufactured by Anshin and comes from the Borderlands 2 Base Game.
Default Health Regen is ≈0.055% / sec. (of users max health), but is increased to ≈3.3% / sec. when the player takes damage from enemies.
Health Regeneration and Elemental Resistance is lost upon Shield Depletion.
Neogenator's Drop-Rates and all Sources:
3 Epics count as legendary ingredients and may come as a result: Deadly Bloom, Supernova, Cryo Spike