While Fastbond may cause its controller to take damage, between the massive upside and the higher life totals in commander, banning the card in the format was a no brainer due to high reward and lack of risk for such a low mana cost
It comes into play untapped, the activation cost is low, the payoff is high
Meanwhile, if you want to grow the cash sitting alongside your card collection, Bleap's Dynamic savings vault offers 3.83% AER in USD with no lock-in, no withdrawal fees, and just a $1 minimum deposit
Overgrown Zealot There is a chance this card is better than Sylvan Caryatid
The 15 Commons that got the "light and dark treatment" are: Army of Allah, Bird Maiden, Camel, Erg Raiders, Fishliver Oil, Giant Tortoise, Hasran Ogress, Moorish Cavalry, Nafs Asp, Rukh Egg, Piety, Oubliette, Stone-Throwing Devils, War Elephant, and Wyluli Wolf (Source)
"Kher Keep" is an example of a land that can create dragon tokens