Soul Echo enters the battlefield 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.
NM-Mint - $1.50
Lightly Played - $1.30
Moderately Played - $1.20
Heavily Played - $1.10
Damaged - $0.80
NM-Mint Non English - $1.50
Lightly Played Non English - $1.30
Moderately Played Non English - $1.20
Heavily Played Non English - $1.10
Damaged Non English - $0.80