A new Aether Revolt card, "Decommission", states: "If a permanent you controlled left the battlefield this turn, you gain 3 life".
I suspect that would mean if you sacrificed 3 artifact tokens, then played decommission later on you would gain 9 life.
My confusion is that I would expect to see "for each permanent that left the battlefield this turn" to give the total of 9 life. As it is written, I am thinking just 3, but is "each" implied? Pretty basic question I guess. Thanks in advance.