I've never seen this combo deck (if you could call it combo) before. I Like
I'm not sure if you find yourself needing the cycling of Street Wraith or it was just because you ran out of 0-cost creatures, but if you were looking for more you could run Phyrexian Marauder and/or Shifting Wall as additional free creatures. There wouldn't even have to be a Multani's Presence out for them to contribute to Songs of the Damned either.
Super functional but I imagine its a way to lose friends if you play a deck that wins so early. Kinda reminds me of the Flash combo or the Painters Grindstone combo where its cool to watch it go off once or twice but loses its appeal.