When Greta enters, create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")
, Sacrifice a Food: Put a +1/+1 counter on target creature. Activate only as a sorcery.
, Sacrifice a Food: You draw a card and you lose 1 life.
(08/11/2024)
If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, you can sacrifice Tough Cookie (an Artifact Creature — Food Golem) to activate Maraleaf Rider's ability (an ability with "Sacrifice a Food" in its cost).
(08/11/2024)
Food is an artifact type. Even though it appears on some creatures, it's never a creature type.
(08/11/2024)
Whatever you do, don't eat the delicious cards.
(08/11/2024)
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.
