Nuka-Cola Vending Machine
, 
: Create a Food token. (It's an artifact with "
, , Sacrifice this token: You gain 3 life.")
Whenever you sacrifice a Food, create a tapped Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
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Nuka-Cola Vending Machine's last ability triggers whenever you sacrifice a Food for any reason, not just to activate a Food's activated ability.
If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, if you sacrifice a nontoken Food artifact, such as Candy Trail from the Wilds of Eldraine set, Nuka-Cola Vending Machine's last ability will trigger.
Food is an artifact type. Even though it appears on some creatures, it's never a creature type.
Whatever you do, don't eat the delicious cards.
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.
