They have some great ones, old and new: Eumidian HatcheryEumidian Hatchery Fabled PassageFabled Passage Vernal FenVernal Fen Twilight MireTwilight Mire If you had told me five years ago that Fabled PassageFabled Passage of all things would end up in a precon, I wouldnt have believed you
The sky's the limit with Displacer Kitten, which says a lot when were talking about a 4-mana nonlegendary creature
Tap the creature to add a green mana then put a -1/-1 counter on it to untap
The same is true for fear, first strike, double strike, haste, landwalk, protection, and trample
Its best when used in a deck with lots of sorcery and damage-dealing cards, as it forces players to pay an increased upkeep cost of one colorless mana per creature (in addition to existing upkeep costs)
It takes too much setup for my liking, but with the right amount of support it could do some work