Once Locke has been blocked, changing its power or the power of the blocking creature won't cause Locke to become unblocked
For now Fiend Artisan seems like a fairly safe buy - before Tyvar it wasn't really on the radar for needing a reprint and it's a one-print mythic - so if you think you might be building around the card in Modern or Pioneer, I'd lean towards picking up copies now
This is because reducing creases is best when the card is wet not to mean you need to soak the card but it needs to be humidified so you can loosen the paper fibers for best results
While its energy requirements can challenge deck construction, careful planning unlocks devastating potential
6 Miku, Voice Of Power (Freyalise, Llanowar's Fury) Singing For The Forest Miku, Voice of Power, is an amazing reskin of the legendary planeswalker Freyalise, Llanowar's Fury
Against the current TCGplayer market price of $42.44, that puts Amazon $2.51 lower than market value