In MTGs early days, playing and casting used to be different things
Clearly, the card will be tough to find, but one Magic collector has already put out a bounty on the card
P/T Set Number 81 Language Franais Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (9/24/2021) Triskaidekaphile's triggered ability will trigger only if you have exactly thirteen cards in your hand as your upkeep starts
They form a blueprint for an archetype that Magics designers can develop in future sets
While Ezuri gains experience counters from Morphs and Ixidor directly supports face-down creatures, Animar is the closest comparison we can make to how Kadena should be evaluated in the format