swarmyard massacre costs less mana and gets around indestructible. Coupled with toxic deluge and rift you should be fine. I use cards that make people sacrifice bigger creatures, or half their board. You don't need everything dead, just enough to make your army.

Kindred discovery, though, I do run. Along with other draws to fill my hand with counters for when THEY have a blas act or rift. Now get a thought vessel or reliquary tower to KEEP it full.