A real cool concept that reminds me of the fun I had while playing the Dungeon Keeper videogames back in the day with a really cool twist on the traditional Dungeon Mastering dynamic.
The thematic correspondence of the Keepers' roles with parts of the body that the Dungeon Heart gives life to is really great as well as the streamlined dice mechanics.
I hope to try it out and see how an enterprising and sadistic Keeper I can be. ;)