Quakestrider Ceratops needs trample to really munching, and twice the power of a Colossal Dreadmaw is nothing to scoff at
Night Soil is the ancestor to the Shards of Alara standout, Necrogenesis, but it works in a similar fashion to keep graveyards, and those who would make the most of them, in check
However, the booster box clearly needed a rethink
The deck has many ways to activate its ability and due to the life-gain triggers being separate from each other, it is not uncommon to receive 2 to 3 +1/+1 counters on all of our creatures in a single turn
The extra colorless mana it provides is often the difference between being the threat and reacting to one
You also need to remember that some commanders are more reliant on artifact ramp, especially those without green