Vial Smasher the Fierce seems like it would work better with Ludevic, Necro-Alchemist (and I honestly thought about pairing those two together at first), but hear me out
Additionally, when paired with cards such as Ashnod's Altar, these tokens can be cashed in for large sums of mana that can be used to cast important and impactful spells to help close out games
You can also strike political deals: Hey, lemme hit you and steal some of your cards, and Ill give your commander a +1/+1 counter whenever I cast something of yours. Tasha, the Witch Queen is here mainly for the static ability that gives you demon tokens whenever you casts your opponents spells
Thanks to the unique partner ability, friends forever, you often see Bjorna alongside Wernog, Rider's Chaplain, as the latter provides you with the artifact tokens Bjorna needs
Of those properties, though, you definitely won't see Yu-Gi-Oh!, as it's a pretty notable competitor to Magic