Soul Keeper is silver Tarot Card obtainable in Catacombs. When it is equipped all souls that are dropped by the monsters stay longer. It costs 500 gold. To acquire it, player has to kill all the monsters in the level.
In Painkiller Hell & Damnation this card can be obtained in Atrium Complex and costs 500 gold. To acquire it, player has to finish the level in less than 7 minutes.