Thanks for all the replies here. Here are my proposed changes to the card :
1. Both versions will only remove 2 cards (more if you have enough )
2. Upgraded version costs 2
3. The damage done to yourself becomes 9 per card in normal version and 7 per card upped in upgraded version
What do you think ?
why not use braveries system? 2 cards normaly, and when you have a fire or darkness mark 1 extra for the unupped and 2 extra for the upped
That's an interesting suggestion ! Haven't thought of that before. Surely I will consider this when making the new version.
But wouldn't this change make it too similar to the Other card ? Cards that have mark affinity are all Other cards (shards were once Other cards anyway), but Hell Fire does have its own element which I don't want to change.