Also, you may then switch it with your Active Pokmon.
Tragic Keepsake: One way to interpret the card art of "Destruction Swordsman Fusion" and "Buster Blader, the Dragon Destroyer Swordsman", as the former shows him kneeling by a grown Buster Whelp, "Buster Dragon", body aglow, and the latter shows him decked out in its scales as part of his armor and sword
Even with those differences, one thing stays true in every Bracket: A strong deck is cohesive
Thanks to Dark Ritu uh Thought Scour, the big Dragon can show up as early as turn two, but will commonly show up around turn four with Counterspell to protect it
Go, have it, and remember that your Miirym deck is very likely Bracket 4, even without running more than three Game Changers