The amount of Shinedust a Flair will cost varies depending on the Flair you wish to unlock
Blood Artist is pretty cleanly more appealing than Zulaport Cutthroat for checking for creatures controlled by any player, but Marionette Apprentice clocking in as either a 2/3 or bringing a friend to the battlefield makes it a lock for any Cube interested in Blood Artist
It could also see play in Elemental tribal decks, like Omnath, Locus of the RoilOmnath, Locus of the Roil and Horde of NotionsHorde of Notions, though it's competing in a tough spot against Omnath, Locus of RageOmnath, Locus of Rage and Avenger of ZendikarAvenger of Zendikar at the seven-mana spot
But even better than that, it also doubles triggers from your birds or your lands
Typically, either the coloured circle, or the superimposed symbol, or both, may be printed too large
It could also buy you enough time by unsummoning a full horde of attackers against your slow board, allowing enough time for you to catch-up blockers to your opponent's fast start
