Criatura — Humano Cavaleiro
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Obstinação — Se ao menos três manas brancos tiverem sido gastos para conjurar esta mágica, Paladina do Vale Arden entra no campo de batalha com um marcador +1/+1.
If an effect allows you to cast a spell without paying its mana cost, you can't choose to cast it and pay unless another rule or effect allows you to cast that spell for a cost. Similarly, you can't waive a cost reduction unless that effect says you may.