Hmm... It's not a bad idea, but my main reservation is the healing. For one thing, it's weird to have a place with "fire" in its name that heals you sometimes, though that's something that could easily be dealt with if we change the name. It also steps on Gloria's toes a bit to have any healing, though perhaps not as much as some other suggestions have stepped on other characters' toes. That said, there's a reason why Gloria is the only healing character (except for DeGrey's Troublesome Rhetoric, but that's much less reliable), and that's to prevent the game from stalling longer than it's supposed to. Admittedly, that's probably less of an issue here since Throw forces at least one player to take damage (so you can't ever be completely safe when you play the healing option), but I'm thinking something like this might work better:
If you combat-reveal a Block and take damage or block damage, take (x) additional damage. If you combat-reveal a Throw and take damage, take (x) less damage.
This still leads to more aggressive play, but the changed throw clause never gives players the opportunity to stockpile the life they would have gained from your version, since you only benefit from the "healing" if you actually get hit. I'm not as attached to the changed version of blocking, but I thought it was worth bringing up to see what you think.
After discussion with @Zqxx, I've made an adjustment to Liar's Lair. Now you only draw a card if you win combat with the option you declare, meaning that there's more incentive to lie when you declare what combat option you're going to use. For example, blocking is good because declaring it and winning with puts you at +3 cards on your next turn, but if your opponent throws you it's just as bad as normal. So you should obviously attack instead... But then you don't benefit from Liar's Lair at all, and you also have to keep in mind what your opponent has declared. Hopefully this will lead to the same kind of fun as Pandante, where both players are lying half the time and they both know it!