Black is also a better color for this sort of threat than green, due to having better interaction
Vanquisher's Banner and Icon of Ancestry work like this, giving all your Goblins +1/+1, but the more Goblin lords you control, the more of a threat your swarm of 1/1 creeps will be
A serialized version of Ragavan, Nimble Pilferer has just been sold for upwards of $6,500
The sideboard (along the right) has 16 cards right now because I can't decide what to cut
Piru, the Volatile With Piru, the Volatile around, you can opt to pay the mana and keep a 7/7 flying and lifelink dragon around, or let it die to deal 7 damage to each nonlegendary creature
For instance: A deck with a commander that costs two mana may avoid 2mv ramp because it anticipates playing its commander on turn two instead of ramping