New Redemption Grab Bag now includes an assortment of 500 cards from five (5) different expansion sets. Available at Cactus website.
Hey! Welcome to the game! I'm glad you seem to be enjoying it. That's certainly an interesting approach to a cost system, and it might work for the Starter decks which have limited types of abilities and cards, but I think that at higher levels of gameplay this would warp the game too much. For instance, there are Evil Enhancements that are territory class that allow you to bounce (return to owner's hand) any number of Heroes. If you bounce all your opponent's Heroes then suddenly they have to start over in "paying" for them. Those bounce cards would then need to have a high cost assigned to them somehow. There are also Artifacts that let you bounce humans (good or evil) pretty easily, so either those would have to have a high cost to stop you from easily bouncing your opponent's defense when they don't have the bondage counters to replay them, or it would skew everyone toward playing non-human defenses. And those are just a few examples. You'll also notice as you get further into the game that the strength of the Hero doesn't necessarily translate to the usefulness of the Hero. A lot of times it's better to have low-numbered characters to increase your chances of having intiative to play first in battle because there are a lot of strong Enhancements to use.I'm curious to see how it works out if you do try (or have tried) it out with the Starter decks, but I think I like that Redemption is unique from a lot of other TCGs in this way and frankly, it has survived 27 years without it. The general approach in Redemption is to limit cards during the design phase, not to just make the cards and then slap a higher cost on the ones that are OP as some games more or less do. It has it's flaws and some cards "slip through the cracks", but I think overall the game is in a pretty good spot right now, balance-wise. Hopefully this feedback is helpful and I certainly don't mean to discourage further ideas and brainstorming, but I'd encourage you and your sons to try out new cards and themes and evaluating the balance again. I'll also shamelessly plug my YouTube channel (link in my signature below) which might help you get a better idea of how the game plays out at an experienced level.