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
card advantage in the command zone rarely is
Arvad the Cursed Aryel, Knight of Windgrace Bartolom del Presidio Blood-Cursed Knight Breathless Knight Corpse Knight Elder Arthur Maxson Elenda, Saint of Dusk Elenda, the Dusk Rose Judge Magister Gabranth Knight of the Last Breath Knights of the Black Rose Legion Lieutenant Order of Sacred Dusk Resolute Rider Ria Ivor, Bane of Bladehold Shay Cormac Squall, SeeD Mercenary Stillmoon Cavalier Syr Vondam, Sunstar Exemplar Syr Vondam, the Lucent Triumphant Adventurer Vona, Butcher of Magan Wintermoor Commander
Not so fast
But I think the best stained glass card is this Secret Lair Arcades Sabboth by Eshpur
The reduced footprint means: Less card movement