I don't expect the singles pricing on these to be all that rough, assuming their pack frequency isn't absurdly bad
When facing Temur Roar, you have to follow up with one-two removal spells as soon as Ureni is cast
Any "as [this enchantment] enters the battlefield" or "[this enchantment] enters the battlefield with" abilities of the chosen enchantment will also work
A card thats heavily played in Commander, Modern, or Legacy might spike in price just because it has an exclusive anime variant
During each player's turn, that player may cast a spell from among the cards they don't own exiled with Ian Malcolm, Chaotician, the mana of any type can be spent to cast it
The TCGO is perhaps most exciting to newcomers though, because it offers a wealth of tutorials, free decks and cards, and single-player AI tournaments to get you ready to build your own deck and play against real people