Usually it comes down to whoever can utilize an especially potent action at the right time such as the Dragon Fire action that banishes one character on the spot to give them the momentum they need to win the game
Tatsunari, Toad Rider technically works as a frog payoff, but that cards almost completely self-contained in an enchantment deck and doesnt really incentivize you to play more frogs
On V-UNION cards, make sure all four pieces match condition
You just shove a bunch of tokens in to attack, and then exile them during End of Combat
This ability blocks all damage to Glaceon from opposing VMAX Pokmon, except from other Glaceons
Those above quotes are from the promotions marketing material, by the way, which goes on from there for several sentences describing what I assume is a convoluted series of microtransactions needed to acquire these Planeswalkers and creatures. With the crossover, Smite players were able to get God Skins of Magic characters, meaning they werent their own unique characters but window dressing for characters already in the game