J'ai trouvé ça sur wikipedia:
"Now while supposedly only one pit exists, there are actually five remaining. The first
belongs to Ra's al Ghul's daughter, Nyssa, who also discovered a way to use the pits indefinitely — whereas before a pit could only be used once. The second is located in the Batcave, created by Batman after he learned that the Pits were necessary to maintain the stability of the world, but wanting to ensure that Ra's could never use the pit to return from the dead again. A third seems to exist high in the Himalayas, used by Black Adam to revive Isis. A fourth Lazarus Pit was revealed to exist in the Australian outback; and the fifth in Tibet."
Du coupe le savoir de Nyssa est "tombé dans le domaine public" et tout le monde peut les utiliser plusieur fois???