I kind of doubt that well be seeing more energy in Standard set releases anytime soon or ever, but this slow trickle of energy cards through supplemental products tickles me as a Cube designer
Play as many pirates as possible, send them into plenty of challenges, and have them stop off at a bunch of powerful locations to gain lore quickly
Another major reason why at least two of the Game Boy cards exist were to replace Base Set Electrode and Fossil Ditto, two mechanically complex cards which undoubtedly caused significant trouble to the developers
If you have the cities blessing, then your Saprolings will get a nasty +2/+2 bonus
Aragorn and Arwen, Wed is a green-white creature card that works best with a large board state, which is easy in these colors
And some cards can have powerful bonuses when destroyed, so be careful with this one