It's not better than wish, because 1 mana really counts for this decks when starting to combo, but it is definitely and improved Chord of Calling which is a card I was running in my list, although I used it to get non-green creatures (
Burrenton forge-tender,
Yixlid Jailer) into the field at instant speed, which this doesn't do either...
This thing is insanely good anyway.
On another topic:
I have tested the Emrakul list and I just really don't know why don't you guys also run a 2nd win-con, Tendrils/Grapeshot/Concordant crossroads, because this deck gets fizzled so many times while comboing and with only 1 win-con that has to pop up by itself and needs 15 spare mana you are risking your wining chances too much.
k2thej list also seems to rely heavily on an uncountered Glimpse for game one.