Vraska, Golgari Queen
Legendary Planeswalker — Vraska
+2: You may sacrifice another permanent. If you do, you gain 1 life and draw a card.
−3: Destroy target nonland permanent with converted mana cost 3 or less.
−9: You get an emblem with "Whenever a creature you control deals combat damage to a player, that player loses the game."
4
イラスト：
Guilds of Ravnica Promos#213p神話レア英語適正
裁定
2018年10月5日
You choose whether to sacrifice a permanent (and which one to sacrifice) while Vraska’s first ability is resolving. No player may take actions between the time you choose which permanent to sacrifice and the time you do so.
2018年10月5日
Tokens that aren’t a copy of something else don’t have a mana cost. Anything without a mana cost normally has a converted mana cost of 0.
2018年10月5日
If a permanent has 
in its mana cost, X is considered to be 0.