El Eco del alma entra en juego con X contadores de eco en el.

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Soul Echo comes into play with X echo counters on it.

At the beginning of your upkeep, sacrifice Soul Echo if there are no echo counters it. Otherwise, an opponent may choose that for each 1 damage that would be dealt to you until your next upkeep, you remove 1 echo counter from Soul Echo instead.

You don’t lose the game for having 0 or less life.