Like most energy cards, every card on this list makes energy, and then gives you a way to spend it
The land can ETB untapped too
The Gemstone Caverns come in any time you are on the draw and I would usually swap out two of the two-colored lands and either a Gemstone Mine or City of Brass, depending on the matchup
Bloomvine Regent Bloomvine Regent is so simple at what it does that it risks being an auto-include, at least in green EDH decks
Giving you something to think about when deciding to enact the disturb effect
Shifting Shapes At first, my spin on it was having a bunch of Shapeshifters with changeling as my early drops, so when I played one of the Tarkir Dragons like Silumgar, the Drifting Death that had Whenever a Dragon you control attacks in its text box, I could immediately get triggers right away