Self-mill effects, dredge, or cards that let you discard specific cards are great ways to feed your graveyard with precision, so, if you use these resources, you'll be able to copy exactly the permanents you want
Into the Inklands had two rules cards per pack, explaining the new Locations mechanic
When storyborn or dreamborn glimmers encountered this mixed ink, they surged with a power that changed them, transforming them into floodborn glimmers
You can't wait and play them later
That said, its a lot of mana to cast, so you really need to go out of your way to enable it
If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has