Feitiço
Inabalável (Esta mágica custa

a menos por cada oponente para ser conjurada.)
Destrua todas as criaturas.
Causing an opponent to lose the game after you've announced that you're casting a spell with undaunted and determined its total cost won't cause you to have to pay more mana.
Effects that reduce what you pay to cast a spell don't affect its mana value.