Hey @crocodilez, you should be fine. We plan on making many things that require Cinder, this is only the very first set of 4 land cards. It was a proof of concept, and since it went well then its likely we'll do it again at some point this year. Also we plan to use cinder in other ways too, so you should be in good shape.

Regarding the question of whether or not this land card will reopen for minting, the answer is "no" to those specific cards, however there should be more more cards in the future (both land and otherwise). Again this was only 4 total cards - 1 of each rarity and just a proof of concept!

Thanks for tagging me Croco and if you ever have a question, feel free to reach out to me here or on discord too!