u/Easy-Investigator238

So basically im making my own tcg and i am in the conceptual part of everything, i really liked a lot of magic TG combat style and it ended up being one that i wanted to put in my game, my own "mana" is different enough but i do want to use the tapping and the keywords(not necessarily the same keywords, as my thematic is very different) mechanic. I don't know if i will ever sell this game, but i do need to know if it is illegal to do that just in case I try to sell it