Similar to a bug I saw posted a few posts down.
Created a malignant cell while playing against miracle. A few turns later, I devoured the malignant cells that were created. The original malignant cell, however, kept regenerating - every time I devoured it (I was using multiple Scarabs), it would die, and another 1/1 malignant cell would take its place.
Seems to be pretty significant, as it gives one side a never-dying creature, both sides infinite devour fodder, and both sides may do weird things with graveyard, vulture, or bone wall.