Smoke Spirits' Aid Wizards really needs to slow down on things that make a bajillion treasures, because it's contributing to the Commander format getting faster and faster
It sat at $1 at the beginning of August, according to MTG Goldfish prices, but now the card's potential in Modern has been realized, and it seems to be creeping steadily upwards
He is very good, and very rounded offering a wider variety of abilities that work well in any deck and as a result I find I play him in almost every green deck I build and 100% of the heavy/mono green decks
Stet, Draconic Proofreaders white ability helps to make sure that the damage will resolve
Again, its hard to see if you dont have something to compare it to though
Planeswalkers are high value targets and I would say that green decks average around three per list