I have seen a couple of youtubers talk about some older cards when building decks, and I personally would want some that I think would work well in a deck. I was wondering how can you get wild cards, and is there a way of crafting old cards
You can get wild cards by buying packs from older expansions, or by buying and playing the old adventures. You can also craft all wild cards.
In the collection manager, when you switch to crafting mode, you should be able to see all wild cards, by changing the collection filter from Standard to All cards. Or to specific expansions.
Note that the wild expansions will only be visible if your account has unlocked access to wild mode. This requires you to not be in the “new player ranks” (recently renamed to apprentice ranks); you need to be at least Bronze 10. And you need to possess at least one wild card already. If you had cards that rotated to wild last month, then that will be met automatically, otherwise you will have to buy and open one wild pack.
Do be aware, though, that wild cards are only allowed if you play in “wild” mode. And that due to how long the game exists, there are now A LOT of wild cards, so it can be hard to be competitive in Wild on a newer account.