User blog comment:Amerson26/What if a leviathan swallows someone with the mark of cain?/@comment-109.192.18.99-20151111075823

Nothing can kill the bearer of The Mark of Cain, therefore:

1. Dick couldn't eat Cain

2. Dick can eat him but Cain will be come back soon after.

3. Dick can eat his body but not his demonic essence (remember the Mark is not just a physical thing, it is integrated in the bearer's essence)