Drawing a card whenever you cast a spell with mana value 5 or greater is excellent with sweepers like pre-rotation Sunfall, where you can kill every creature and draw a card, with removal spells like Leyline Binding, or with the various Overlords that can enter the battlefield for cheap via impeding, like Overlord of the Hauntwoods
Considering how tall some of these hydras grow on their own, theres nothing wrong with adding in some of your favorite ways to grant them abilities like flying, lifelink, and trample to really give your opponent fits
Dont skimp on the fight effects
With ONE, there are 29 rares from the main set, 5 new rares from Jumpstart , and the new rare or mythic rare cards from the ONC Commander decks that can be found with the extended-art treatment
Aurora Shifter is definitely in the generator category: energy-link is a very potent option which can turn any kind of power-buff on your creatures into the other kind of power
Put down those poisoned apples and get ready for a great Golgari treat