Zaxara, the Exemplary
Commander 2020 — Mythic
Legendary Creature — Nightmare Hydra
Zaxara, the Exemplary rulings:
2020-04-17: The value of X in Zaxara's last ability is the value of X of the spell you cast.
2020-04-17: If the spell you cast has in its mana cost, the token gets only X counters, not twice X.
2020-04-17: The Hydra token enters the battlefield as a 0/0 creature. Any abilities that modify or trigger on this event apply. After the token is on the battlefield but before any player can take actions, +1/+1 counters are put onto the token.
2020-04-17: If X is 0, the 0/0 Hydra token will die immediately after the ability's done resolving unless something else is raising its toughness.
2020-04-17: If an effect, such as that of Parallel Lives, causes Zaxara's ability to create multiple Hydra tokens, they each receive X +1/+1 counters.