インスタント
クリーチャー1体を対象とする。あなたは食物1つを生け贄に捧げてもよい。そうしたなら、ターン終了時まで、それは+4/+4の修整を受ける。そうしなかったなら、ターン終了時まで、そのクリーチャーは+2/+2の修整を受ける。
If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, you can sacrifice Lembas to Pippin's Bravery.
You choose a target creature as you cast Pippin's Bravery, but you don't choose whether to sacrifice a Food until the spell resolves.
If the target creature is an illegal target by the time Pippin's Bravery tries to resolve, Pippin's Bravery is removed from the stack. You won't be able to sacrifice a Food to it.
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.
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).
Whatever you do, don't eat the delicious cards.