Run it at high-power tables where extra turn loops are okay
Life is a resource thats meant to be spent, so he lets you pay life instead of spending black mana costs
Since those goaded creatures probably cant block the next turn, it also means more free attacks and more free triggers
Since there's no better source than the actual emails, I'll be quoting them liberally throughout this article (in the cases where we need to reserve an idea for the future, the text will be replaced with bracketed italics summarizing it)
Our life-gain creatures put pressure on our opponent to remove them, but its one of those situations in which the opponent is really not happy using resources doing so
In an Allies deck, getting a whole raft of EtBs is also very, very good