The dark atmosphere here resonates with me the most!

I like how you themed each opponent with their own decks, each making sense for them and their background. Some great sound effects too!

My favorite cards are Mist of Miasma, Vengeful Wrath, and Beast of Dead (which, in my opinion, could have a louder and more frightening audio effect).

Without a battle ost the battles are more creepy, and then the sacrifical soul make my soul fly out of my body.