Small details like this make a huge difference
Shrines do everything you need a deck to do: you ramp with Sanctum of Fruitful Harvest, draw cards with Honden of Seeing Winds, take out threats with Honden of Infinite Rage, and win the game with Sanctum of Stone Fangs
Since the Game Boy is a portable device, these creatures could then be exchanged with other players in real life using the link cable
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But recent set releases have helped address these weaknesses, and every mono-colored deck has a weakness or two in Commander
Beyond that, if your board is littered with a lot of blue pips after playing cards such as Future Sight, Arcanis the Omnipotent, Azami, Lady of Scrolls or any other cards with blue in their casting cost which, if youre playing Wizards, will likely be most of them then the ability to win the game on the spot becomes even easier, making this tricky little Merfolk an unassuming yet powerhouse threat for Wizards