It might seem like this card has three different modes, but in most games you will be using either of the two more powerful ones: either kill a creature or kill a creature and make a 1/1 token
Despite this creatures high mana cost, it can operate well with enough as a soldier typal, commander, or a stax piece
You can see here how do we test them to assure their authenticity
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
Granted, you have to have a card to exile and go down a card, but any land that can produce multiple mana (especially on turn one) will see play
Its fine I guess, though it will probably underperform