This card also has some fringe combo uses it can shield you from your own Command the Dreadhorde or Madcap Experiment
First introduced back in Scars of Mirrodin, proliferate was used to multiply not only -1/-1 counters on creatures or loyalty counters on planeswalkers, but also poison counters on players to provide an alternate win condition
If you have Nissa and your opponent has a single non-flying, non-trampling creature, its going to need help to get through and actually damage her
If you start with a Zombie Army and amass Orcs, that token also becomes an Orc
The only thing keeping me from diving into that project is that I've been out of the game for three weeks, which for me something like nine play sessions and means I've missed out on probably over twenty games I could have played
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