Once you have opened up the Elite Four Battle, you can just start from there.
But, if youre doing that, youve missed the point entirely
Just playing Bloom Tender alongside gold cards will already be worth it, let alone a card like Atraxa, Praetors' Voice
Synchro Karakuri would almost always be summoned in attack, but in order to proc some battle switch effects or get counters for Anatomy, you may need to summon them in defense in rare scenarios
In contrast to Flamehold GrapplerFlamehold Grapplers one-two punch value combo, Mardu SiegebreakerMardu Siegebreaker tucks a creature away until combat and then hits your opponents really hard with three of them
Its appearances in subsequent games like Pokmon Sword and Shield, with regional variants like Paldean Wooper, have kept it relevant and beloved by fans old and new