Soul Echo | Magic: The Gathering
Formats Soul Echo is Legal in
Official Oracle Text for Soul Echo
You don't lose the game for having 0 or less life.
At the beginning of your upkeep, sacrifice Soul Echo if there are no echo counters on it. Otherwise, target opponent may choose that for each 1 damage that would be dealt to you until your next upkeep, you remove an echo counter from Soul Echo instead.
Official Rulings for Soul Echo
10/4/2004 : If this card runs out of counters before your next upkeep, the effect still replaces the damage and uselessly tries to remove counters from the now empty card.
10/4/2004 : In a multi-player game, you choose a new opponent during each of your upkeeps.
10/4/2004 : If you take damage between the start of the upkeep step and the time in which the upkeep trigger resolves, then Soul Echo will not affect that damage and you will be affected by the damage as normal.