Mirage

Soul Echo

When you play Soul Echo, put X echo counters on it.
At the beginning of your upkeep, if there are no echo counters on Soul Echo, bury it; otherwise, target opponent may choose that for each 1 damage dealt to you until your next upkeep, you instead remove 1 echo counter from Soul Echo.
You do not lose the game as a result of having less than 1 life.

Soul Echo enters with X echo counters on it.
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.