Use commons and uncommons to improve your pre-cons and get deck building experience : The common and uncommon wildcards are the most abundant and the easiest to get, so try to tinker around with those to get some experience in deck building and crafting cards
Tatsunari, Toad Rider makes a 3/3 legendary Keimi token whenever you cast an enchantment spell if you dont already have one in play
Ardyn Izunia (Varragoth, Bloodsky Sire) Rating: 6/10 Varragoth, Bloodsky Sire is somewhat unassuming
You may need to work to explain how a deck doesnt need Sol Ring, but those decks exist
On top of that, its a solid 4/4 body, so its not dead weight even if youre waiting for your counter synergies to kick in
Fortunately, there are places that offer fairly generous rates for the low-priced cards youre no longer interested in