@splinterlands has this thing. It's called "Land" - and it's going to run like hell this year, and for the future. It's the rug that ties the game together. It's cleaning up messes already, like the over-printing of Chaos Legion. And it's just the start.
https://peakd.com/hive-169191/@beelzael/making-time-crystals-craftable-is-a-genius-move
Shame the card players are being forced to buy from the land barons. Feels bad, but good for the land guys, I guess.
Hm only for Wild League. Modern cards are not a good idea for land, except for BF. And in my experience, there are little cards left in the older editions that regularly beat the modern ones.
That might just be a recency bias from the automated services. Most people have the old cards on land, so there are fewer to play in Wild. I do think there are quite a few Wild cards that are used quite often when I look through my battle logs to see what is working in Wild!
Some of the Untamed summoners are beasts, like Yodin or Llama with Kron. There are indeed some key cards that I bought to play, and will not put on Land, though they're Beta edition (Lord Arianthus for example). But I also only buy cards for land with high PP/DEC