Rituel
Acquérez le contrôle d'une créature ciblée jusqu'à la fin du tour. Dégagez cette créature. Elle acquiert la célérité jusqu'à la fin du tour. Créez un jeton Sang. (C'est un artefact avec «

,

, défaussez-vous d'une carte, sacrifiez cet artefact : Piochez une carte. »)
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.
Some spells that instruct you to create a Blood token require targets. You can't cast these spells without choosing all required targets, and if all of those targets become illegal targets, the spell won't resolve and you won't create any Blood tokens. If some but not all of those targets become illegal, you'll do as much as possible, including creating Blood tokens.
If an effect refers to a Blood token, it means any artifact token with the subtype Blood, even if it has gained other subtypes.