Extinction Event
Sorcery
Choose odd or even. Exile each creature with mana value of the chosen quality. (Zero is even.)
Filip Burburan
Magic Online Promos (PRM)
• #80881Rulings
The mana value of a token that isn't a copy of another object is 0. A token that is a copy of another object has the same mana cost as that object.
(wotc • 2020-04-17)
If a creature on the battlefield has {X} in its mana cost, X is considered to be 0.
(wotc • 2020-04-17)
You choose odd or even while Extinction Event is resolving. Players can't take any actions between the time you make that choice and the time some creatures go extinct.
(wotc • 2020-04-17)
Rulings
The mana value of a token that isn't a copy of another object is 0. A token that is a copy of another object has the same mana cost as that object.
(wotc • 2020-04-17)
If a creature on the battlefield has {X} in its mana cost, X is considered to be 0.
(wotc • 2020-04-17)
You choose odd or even while Extinction Event is resolving. Players can't take any actions between the time you make that choice and the time some creatures go extinct.
(wotc • 2020-04-17)