Anything you can play for free is good in any TCG, and in Lorcana exerting a creature to play one is almost always a good deal when you get the chance
This power is redundant in 1v1, but in a multiplayer format, it offers a player a way to bypass the usual rules and sweep a win, forcing an interesting dynamic where other players need to protect Shinryus target
Ardyn, the Usurper Braska's Final Aeon Cecil, Dark Knight Deadly Embrace Galian Beast Golbez, Crystal Collector Jecht, Reluctant Guardian Jenova, Ancient Calamity Kain, Traitorous Dragoon Kuja, Genome Sorcerer Midgar, City of Mako Ninja's Blades Noctis, Prince of Lucis Seymour Flux Shinryu, Transcendent Rival Sin, Spira's Punishment Squall, SeeD Mercenary Summon: Primal Odin The Darkness Crystal Trance Kuja, Fate Defied Vincent Valentine Xande, Dark Mage Zenos yae Galvus Zodiark, Umbral God
This is an insanely fun and powerful commander to build around, provided you give her the right support