Speculating about the Core Set 2021
I've been thinking about Mark Rosewater's teasers about the Core Set 2021, and I think I nailed some of the cards.
A card that’s never been reprinted before which has a 2, 3, 5 and 6 all appear on the card.There are 4 unique possibilities: Massacre Wurm, Kabira vindicator, kazandu duskcaller and this beauty here never reprinted before:
A card from the Time Spiral timeshifted sheet.
Correction. Before I had several cards here, but they were planeshifted. All Timeshifted cards can be seen here. Some examples: