As the rules are today, one-of cards simply have too high of a risk of ending up as a face-down Prize Card, let alone a Prize Card the player in need might never seen before it is already too late for them to turn things around
While I think it is technically optimal since it's basically a free roll, we didn't play against counterspell decks at all
On the front side, Invasion of Ikoria tutors any creature with mana value X or less and puts it onto the battlefield
They usually have about six threats and I have about twenty answers
The mana, which can be buffed by buffing Vhal, can be used to power activated abilities of things like infinite combo partner Staff of Domination
Thats not worth buying Revival Trance for on its own, sure, but its a great added bonus