Regardless, merfolk of any MTG plane consistently support their creature type, be that as your classic Lord of Atlantis or cards like Silvergill Adept and Deeproot Elite that demand a shoal of merfolk to support them
Im pretty good at pegging specific types of cards, but when looking at a non-linear deck on paper, Im often way too harsh on it
Many cards will under or over perform based on initial impressions as the format takes shape
You will get simple combos and current meta considerations
This MTG precon deck isn't exactly stuffed with artifacts and enchantments to bring back, but there's a few of each, so it's feasible you'll have some targets for the second effect too
Next you have evasion like cant be blocked, flying, or menace