Interestingly, the new Vaporeon card also has new abilities and attacks compared to the one released in Genetic Apex, so expect some new prints of already existing cards
One important thing to note is that the new cards from the Space-Time Smackdown expansion will not be tradeable at launch of the system
For instance: if you had three Clues, enough mana, and all the relevant cards exiled under Lazav, you could cast Cackling Counterpart targeting Lazav, hold priority before it resolves, sacrifice a Clue to trigger Lazav to transform him into Marionette Master, hold priority again, sacrifice another Clue to trigger Lazav to transform into Octavia, Living Thesis, hold priority once more, cast Armor of Shadows, let everything resolve, then sacrifice a final Clue
Its a complicated process indeed, as we see, and its fun in a full-circle kind of way that the first card to make a token uses the word create just as weve done since 2016s Kaladesh
You may choose counters of different kinds