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.
Near Mint - £0.80
Lightly Played - £0.70
Moderately Played - £0.60
Heavily Played - £0.40
Damaged - £0.30
Near Mint Non English - £0.80
Lightly Played Non English - £0.70
Moderately Played Non English - £0.60
Heavily Played Non English - £0.40
Damaged Non English - £0.30