While you can get blown out before this has a chance to do the thing, you can just play some counterspells and a Mirrormade and hope for the best
And, whats more, there will always be those decisive cards that overperform for you that it feels criminal not to be playing
Yes, that does mean this makes it easy to turn this into a solid 4/4 beater that can also block, but four mana to get there is a tall ask given the current speed of the format
Kaheera, the Orphanguard With many companions banned in the most popular Constructed formats, like Jegantha, the Wellspring, Lurrus of the Dream-Den, and Yorion, Sky Nomad, options are limited, but Kaheera, the Orphanguard remains solid for control decks
Adrix and Nev, Twincasters and Thrasios, Triton Hero are great examples of powerful merfolk that work without being part of a dedicated typal deck
As mentioned, two is a lot of mana, but this is a hard counter that counters any card type and does so at a better card economy than any other counterspell at its cost
