Pair that up with the card Dark Ritual, which adds three black mana to your mana pool for just one mana, and you can drop the Specter on your first turn
You will still lose other types of unspent mana as each step and phase ends
Filling out your calendar gives players more to look forward toand to sign up for
Suddenly, you have the run of the board from turn three onward with one of the best removal effects in the game: Armix gets around indestructible and theres no reason you wont have six or more artifacts on the field or in the grave at any time
Liliana is decent at this too but you are not at all short on the three slot
Elrond, Master of Healing FromTheShire: In said scry deck, this does a pretty decent job of slinging counters around and pumping up the team, and then if things are hit with spot removal they at least replace themselves which is useful for creature heavy decks