生物 — 吸血鬼
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当血税收集官进战场时,派出一个血滴衍生物。

,牺牲血税收集官:目标生物得-X/-X直到回合结束,X为由你操控之血滴衍生物数量的两倍。只能于法术时机起动。
You can't sacrifice a Blood token to pay multiple costs.
Some triggered abilities trigger "whenever you sacrifice a Blood token." These abilities trigger regardless of why you sacrificed that Blood token.
The value of X is determined only once, as Bloodtithe Harvester’s last ability resolves.
If an effect refers to a Blood token, it means any artifact token with the subtype Blood, even if it has gained other subtypes.