Its Legendary, and therefore more tutorable
Pair it with Octillery, Empoleon, Dragapult VMAX, Orbeetle VMAX, Zacian V, or so many other potential partners and watch it chip away at your opponents Pokmon until they all wilt under the pressure of G-Max Rapid Flow
This approach to integrating a legendary Pokmon into the core gameplay experience ensures that Miraidon is not just a powerful ally but also a crucial element of the narrative
Considering practically every Commander deck will want at least one of these effects, its no wonder there is high demand
If you're short of any of the above cards in any deck build shown and need a solid substitution, I recommend Jynx, whose attack does an extra 30 damage for every energy the enemy Pokemon has on them (making it great for hurting powerful Pokemon)
There are dedicated Clone decks in Commander that run Clone effects, copy their Commander, and then run things like Mirror Gallery that suspend the Legendary rule
