Savant meneur des bêtes

Text:

Célérité : Ajoutez un mana de la couleur de votre choix à votre réserve. Ne dépensez ce mana que pour lancer un sort de créature.

Rulings:

• 8/25/2015 Mana produced by Beastcaller Savant can be spent on any part of a creature spell’s total cost, including additional costs (such as kicker costs) and alternative costs (such as dash costs). It can’t be spent to pay the costs of abilities of creatures you control.
• 8/25/2015 Mana produced by Beastcaller Savant can’t be used to activate an ability or cast an instant or sorcery spell that creates creature tokens.