The random nature of multicolored energy has been a point of frustration for players but there are ways to mitigate it
It is a Dragon card illustrated by MINAMINAMI Take
The only bad thing I have to say about this card is that the mana can be clunky
I dont expect this to be a system like Pokemon Trading Card Game Online (now called Live, but I dont know if its trading system has remained the same), where you can just put up whatever cards you have and request anything else in return
Last but not least, Commander might be all about your leader, but RPGs are often about your party as a whole, and WOTC wont leave the supporting casts of these games hanging
If youre not so lucky as to have engines like Gemhide Sliver or Heritage Druid in your card pool, then this is another effect that can be worth looking for from your Commander