It's probably enough to put one in the deck
Also, during your Standby Phase, if "Castle of Dark Illusions" is on the field: This card gains 100 ATK/DEF
So being locked out of it can be absolutely devastating to your opponents strategy and it can set you up perfectly for an easy win
However, Eater of Millions is still vulnerable to being negated by Nine Pillars of Yang Zing , so you would need to remove Nine Pillars using Cosmic Cyclone or a True Draco Spell Cards (3)rd effect before attacking with Eater of Millions
23, 2025 Metalflame Swordsman does not support the series, per se, but it does let a Flame Swordsman Deck run Max Metalmorph
It wouldn't be an exaggeration to say that the strongest man who has both strength and romance is a Synchro Monster