I just thought this would be neat, since there is already a Lost Soul that prevents the "redeemer" of it from Burying lost souls in his territory.
Lost Soul, Special Ability: All Lost Souls in redeemer's Land of Redemption are vulnerable to the "Falling Away" card. Negates that player's "Guardian of Your Souls".
Lost Soul, Special Ability: All Lost Souls in redeemer's Land of Redemption are immune to the "Falling Away" card, AND when this lost soul is rescued any other lost souls rescued by redeemer that have "fallen away" and are still in play are immediately returned to the original redeemer's land of redemption. This ability cannot be prevented, negated, or interrupted.
I can see both of these being especially powerful in multi-player, perhaps too powerful. The second one, while powerful, is one that you intend to rescue with your own Son of God, so its power is diluted by the huge risk you take that your opponent will get it first.
Anyway, I'm still new to this, so be gentle with your feedback please