Exactly! I 100% agree with the do not combine sentiment. I combined thousands of BCX worth of Mushroom Seers and Flame Imps which are now worth less than half they would be if I didn't combine them. I have pretty much combined no cards since then.

With the cost of this, there's going to be a lot of arbitrage opportunities at the start but ideally, these opportunities will disappear as the price/single and price/BCX converges to ~10% difference.

I think the DEC cost is fair, 25% of DEC burn rate of the card, so in this case 7.5 DECs per card or 862.5 DECs for a max level Flame Imp. This might be a small amount but with thousands of cards being uncombined it'll add up, plus it'll generate a lot of demand at the start if we include a guild structure that can reduce the DEC cost of uncombining.

Your alpha cards example is actually why I'm raising this point again, many months after I first mentioned this idea publically on Discord. I have tens of thousands of alpha cards which I simply am not able to sell. Out there, there are people who are missing a few alpha cards for the next level and don't want to pay a 200-300% premium just to combine it into their existent card and destroy that value.

I believe for the longevity and long term health of the markets, particularly alpha and beta markets as more and more cards get combined, allowing an uncombine feature at a small cost is vital.