You get that energy through attacking with your creatures, and luckily its not one or more so shouting around with a swarm of myr or Eldrazi spawn can get you where you need to go
Normally, I would advise deckbuilders against going all-in on set-specific mechanical themes like this
If the creature loses flying before Shadow Puppeteers's last ability resolves, the creature will still become a red Dragon with base power and toughness 4/4 in addition to its other colors and types until end of turn
How about doubling up tokens created by Docent of Perfection, Talrand or Inalla
Adventures in the Forgotten Realms Set Boosters contain: At least 1 rare or mythic rare card (approximately 27% of Set Boosters contain 2 rares or mythic rares, 3% contain 3, and it's even possible to open 4 though that's less than 1% of the time.) 1 Traditional foil card of any rarity 1 Rulebook, module, or borderless common or uncommoncheck out the Collecting Adventures in the Forgotten Realms article for details
When these cards do get sold, its often for obscene sums, often tens of thousands of dollars
