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Rulings
A "Dinosaur source" is any object with the creature type Dinosaur. This means you could spend the mana to activate an ability of a Dinosaur you control or a Dinosaur card in your hand or graveyard, for example.
Rulings
A "Dinosaur source" is any object with the creature type Dinosaur. This means you could spend the mana to activate an ability of a Dinosaur you control or a Dinosaur card in your hand or graveyard, for example.
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