When you remove time counters from Benalish Commander you create a 1/1 White Soldier creature token, and Fungal Behemoth rewards you by letting you put a +1/+1 counter on target creature
It works exceptionally well in Commander due to the large number of creatures youll often have at once
The easiest way to get a quick estimate of a cards value is by going on eBay, searching for the item in question, and using the sold items filter to see what people have recently paid for them
I don't believe this iteration on Niv-Mizzet is as powerful as some previous versions of the creature, but that isn't keeping the Dragon Wizard's price down all that much
Form of Approach of the Second Sun is the absolute pinnacle of the set, but cards like it are the exception
For Value If youre looking at straight dollar value, Buckle Up is worth more money mostly thanks to Swift Reconfiguration