Fontaine de transmutation
Artefact

: Créez, selon votre choix, un jeton Sang, un jeton Indice ou un jeton Nourriture.

,

, sacrifiez trois jetons d'artefact avec des noms différents : Cherchez dans votre bibliothèque une carte d'artefact, mettez-la sur le champ de bataille, puis mélangez. N'activez que lorsque vous pourriez lancer un rituel.
Whatever you do, don't eat the delicious cards.
Food is an artifact type. Even though it appears on some creatures, it's never a creature type.
You can't sacrifice a Food to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate Maraleaf Rider's ability.
Some triggered abilities trigger "whenever you sacrifice a Blood token." These abilities trigger regardless of why you sacrificed that Blood token.
You can't sacrifice a Blood token to pay multiple costs.
If an effect refers to a Blood token, it means any artifact token with the subtype Blood, even if it has gained other subtypes.