Exiling a card in a graveyard is a nice bonus especially with all these flashback and disturb cards running around, so I can see Soul-Guide Gryff being a solid curve-topper if you need one
It has trouble walking on its newly grown feet. Attacks Tackle10 Twiddle Flip a coin
Maybe thats the shell where Bartered Cow comes into play
Even with just a single Drowned Secrets on the battlefield, something like Merfolk Secretkeeper (both the adventure and creature modes) into Callous Dismissal on Merfolk Secretkeeper into Merfolk Secretkeeper again ends up milling 18 cards for a total of six mana, making it a great way to close out the game once our opponent's library starts to dwindle
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It provides the ability to grind out when you run out of cards, almost giving you an extra card draw each turn, but better, as it's a permanent of your choice from your graveyard, nulling any efforts by your opponent when using removal spells