I decided to compile a list of all the villain cards that make you do damage to yourself. Why? Well because of cards like Flame Barrier and Battle Stance. Great cards, I often found myself too scared to play them though. Recently I've been loving these cards though. Things I mark with a * means you arent technically dealing damage to yourself, but you might want to be careful about the card backfiring on you or your allies. Even in decks with some of these in them, it doesnt necessarily mean that these cards are bad plays. I'd play Flame Barrier against Advanced La Capitan any time, for example. Anyway, a lot of this was for my own amusement, if somebody else gets something out of it, so much the better.
Akash Bhuta: -
Ambuscade -
Apostate -
Baron Blade: Elemental Redistributor*
La Capitan: Advanced, Split Across Time*
Chairman: -
Citizen Dawn - Be careful not to kill citizens you don't want to*
Dreamer- Be careful not to kill the girl*
Ennead: Osiris
Gloomweaver -
Miss Information: Misplaced Memo, Suspicious Malfunction
Iron Legacy: Demoralizing Presence. Superhuman Redirection*, Advanced: Motivated by Desperation*
Kismet: 2 Left Feet. Hapless Strike*
Matriarch: Killing birds is sometimes bad for you*
Omnitron: -
Plague Rat: Infection, Filthy Vermin Power, Afflicted Frenzy*
Spite: -
Grand Warlord Voss -