Processing Prosperity

I wanted to see if I could get Prosperity of the Reach to work. Some of the best cards in Expedition right now put cards into the void. Is that enough to turn on Prosperity reliably?

The idea is to dump as many units into your void as quickly as you can and then use Prosperity of the Reach to take extra turns. Note - once you attack on your first turn, your opponents blockers are exhausted, so your second turn they cant block again. You can push tons of damage this way. Shiftstone Processor isnt necessary, but if you can get it out it can create some busted turns because it counts every unit that is discarded and you can double/triple spell easily in a turn.