Related: MTG Tournament Rules Updates Brings Answers About Forgotten Realms MTG Mechanics What do you think about the new cards with Phasing
Sin Prodder allows you to gain a draw advantage or do damage to your opponent
Sure, it will get big really quickly in this deck and does have nice synergy as an alternate win condition but, at the end of the day, its not a Merfolk, and it wont be unblockable
If you are going mono red then these cards start to look interesting, if you are just splashing black for Cutthroat and Artist then again, looking quite reasonable
Extended-Art Cards In Collector Boosters, you'll be able to find extended-art versions of cards from the Commander Masters Commander decks
It is the metagame equivalent of playing a Storm deck in Legacy against a deck like Goblins